Задания, страница 124 - гдз по геометрии 7 класс учебник Смирнов, Туяков

Геометрия, 7 класс Учебник, авторы: Смирнов Владимир Алексеевич, Туяков Есенкельды Алыбаевич, издательство Мектеп, Алматы, 2017

Авторы: Смирнов В. А., Туяков Е. А.

Тип: Учебник

Издательство: Мектеп

Год издания: 2017 - 2026

ISBN: 978-601-07-0873-0

Утверждено Министерством образования и науки Республики Казахстан

Глава 4. Окружность. Геометрические построения. Параграф 22. Окружность, описанная около треугольника. Окружность, вписанная в треугольник - страница 124.

App\Models\Task {#1030 // resources/views/models/task/default.blade.php
  #connection: "mysql"
  #table: "tasks"
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  #keyType: "int"
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    "id" => 1129879
    "created_at" => "2026-04-10 13:58:26"
    "updated_at" => null
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    "field_page_end" => "125"
    "field_url" => "/7-klass/geometrija/smirnova-uchebnik/samost-22"
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      #items: []
      #escapeWhenCastingToString: false
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        0 => App\Models\Branch {#1035
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            "created_at" => "2026-04-10 13:58:26"
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                        0 => App\Models\Term {#1048
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                        1 => App\Models\Term {#1049
                          #connection: "mysql"
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                        "alt" => ""
                        "width" => "1632"
                        "height" => "2472"
                      ]
                    ]
                    "field_popular_book" => null
                    "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1063
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_new_book" => Illuminate\Database\Eloquent\Collection {#1064
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_old_book" => Illuminate\Database\Eloquent\Collection {#1065
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_url" => "/7-klass/geometrija/smirnova-uchebnik"
                    "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1066
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_metatags_title" => null
                    "field_metatags_description" => null
                    "field_h1" => null
                    "field_description_top" => null
                    "field_description_bottom" => null
                    "breadcrumbs" => array:3 [
                      "class" => 378
                      "subject" => 543
                      "class_subject" => 389
                    ]
                  ]
                  #original: array:50 [
                    "id" => 2907
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "field_tree_default_status" => "tasks"
                    "field_pages_status" => null
                    "field_subject" => Illuminate\Database\Eloquent\Collection {#1041}
                    "field_class" => Illuminate\Database\Eloquent\Collection {#1043}
                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1045}
                    "field_author" => Illuminate\Database\Eloquent\Collection {#1047}
                    "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1050}
                    "field_book_type" => Illuminate\Database\Eloquent\Collection {#1051}
                    "field_country" => Illuminate\Database\Eloquent\Collection {#1053}
                    "field_city" => Illuminate\Database\Eloquent\Collection {#1055}
                    "field_series" => Illuminate\Database\Eloquent\Collection {#1057}
                    "field_umk" => Illuminate\Database\Eloquent\Collection {#1058}
                    "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1059}
                    "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1060}
                    "field_publication_number" => null
                    "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1061}
                    "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1062}
                    "field_under_the_edition_degree" => null
                    "field_cover_description" => null
                    "field_publication_year" => "2017"
                    "field_publication_year_until" => null
                    "field_part" => ""
                    "field_part_writing" => ""
                    "field_second_foreign_language" => null
                    "field_for_whom" => "Учебник для 7 класса общеобразовательной школы"
                    "field_allowed" => "Утверждено Министерством образования и науки Республики Казахстан"
                    "field_reserve_field" => null
                    "field_link_to_source" => null
                    "field_tasks_count" => "528"
                    "field_priority" => "2"
                    "field_default_folder" => "/geometrija_07/Smirnova-u17/"
                    "field_isbn" => "978-601-07-0873-0"
                    "field_cover" => array:1 [
                      0 => "/media/geometrija_07/Smirnova-u17/covers/cover1.webp?ts=1753259592"
                    ]
                    "field_cover_alts" => array:1 [
                      0 => ""
                    ]
                    "field_covers" => array:1 [
                      0 => array:4 [
                        "path" => "/media/geometrija_07/Smirnova-u17/covers/cover1.webp?ts=1753259592"
                        "alt" => ""
                        "width" => "1632"
                        "height" => "2472"
                      ]
                    ]
                    "field_popular_book" => null
                    "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1063}
                    "field_new_book" => Illuminate\Database\Eloquent\Collection {#1064}
                    "field_old_book" => Illuminate\Database\Eloquent\Collection {#1065}
                    "field_url" => "/7-klass/geometrija/smirnova-uchebnik"
                    "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1066}
                    "field_metatags_title" => null
                    "field_metatags_description" => null
                    "field_h1" => null
                    "field_description_top" => null
                    "field_description_bottom" => null
                    "breadcrumbs" => array:3 [
                      "class" => 378
                      "subject" => 543
                      "class_subject" => 389
                    ]
                  ]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1067
              #items: []
              #escapeWhenCastingToString: false
            }
          ]
          #original: array:24 [
            "id" => 1129379
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => "Окружность. Геометрические построения"
            "field_branch_order" => "4"
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1038}
            "field_page_start" => "101"
            "field_branch_display" => "0"
            "field_branch_expanded" => "0"
            "field_display_branch_in_title" => "1"
            "field_display_task_interval" => "0"
            "field_display_branch_page" => "1"
            "field_branch_title_in_content" => "0"
            "field_navigation_title" => null
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_branch_cover" => []
            "field_branch_covers" => []
            "book" => Illuminate\Database\Eloquent\Collection {#1039}
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1067}
          ]
          #changes: []
          #casts: []
          #classCastCache: []
          #attributeCastCache: []
          #dateFormat: null
          #appends: []
          #dispatchesEvents: []
          #observables: []
          #relations: []
          #touches: []
          +timestamps: true
          +usesUniqueIds: false
          #hidden: []
          #visible: []
          #fillable: []
          #guarded: array:1 [
            0 => "*"
          ]
        }
      ]
      #escapeWhenCastingToString: false
    }
    "parent_branches" => Illuminate\Database\Eloquent\Collection {#1103
      #items: array:2 [
        0 => App\Models\Branch {#1111
          #connection: "mysql"
          #table: "branches"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
          +preventsLazyLoading: false
          #perPage: 15
          +exists: true
          +wasRecentlyCreated: false
          #escapeWhenCastingToString: false
          #attributes: array:24 [
            "id" => 1129379
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => "Окружность. Геометрические построения"
            "field_branch_order" => "4"
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1115
              #items: array:1 [
                0 => App\Models\Term {#1112
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:7 [
                    "id" => 29
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "Глава"
                    "field_cases" => array:6 [
                      "field_accusative_case" => "Главу"
                      "field_creative_case" => "Главой"
                      "field_dative_case" => "Главе"
                      "field_genitive_case" => "Главы"
                      "field_nominative_case" => "Глава"
                      "field_prepositional_case" => "Главе"
                    ]
                    "field_page_check_not_needed" => null
                    "field_short_name" => null
                  ]
                  #original: array:7 [
                    "id" => 29
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "Глава"
                    "field_cases" => array:6 [
                      "field_accusative_case" => "Главу"
                      "field_creative_case" => "Главой"
                      "field_dative_case" => "Главе"
                      "field_genitive_case" => "Главы"
                      "field_nominative_case" => "Глава"
                      "field_prepositional_case" => "Главе"
                    ]
                    "field_page_check_not_needed" => null
                    "field_short_name" => null
                  ]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "field_page_start" => "101"
            "field_branch_display" => "0"
            "field_branch_expanded" => "0"
            "field_display_branch_in_title" => "1"
            "field_display_task_interval" => "0"
            "field_display_branch_page" => "1"
            "field_branch_title_in_content" => "0"
            "field_navigation_title" => null
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_branch_cover" => []
            "field_branch_covers" => []
            "book" => Illuminate\Database\Eloquent\Collection {#1143
              #items: array:1 [
                0 => App\Models\Book {#1114
                  #connection: "mysql"
                  #table: "books"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:50 [
                    "id" => 2907
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "field_tree_default_status" => "tasks"
                    "field_pages_status" => null
                    "field_subject" => Illuminate\Database\Eloquent\Collection {#1116
                      #items: array:1 [
                        0 => App\Models\Term {#1113
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
                          #with: []
                          #withCount: []
                          +preventsLazyLoading: false
                          #perPage: 15
                          +exists: true
                          +wasRecentlyCreated: false
                          #escapeWhenCastingToString: false
                          #attributes: array:10 [
                            "id" => 6477
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "Геометрия"
                            "field_abbreviated_name" => null
                            "field_cases" => array:6 [
                              "field_accusative_case" => "геометрию"
                              "field_creative_case" => "геометрией"
                              "field_dative_case" => "геометрии"
                              "field_genitive_case" => "геометрии"
                              "field_nominative_case" => "геометрия"
                              "field_prepositional_case" => "геометрии"
                            ]
                            "field_foreign_lang_name" => null
                            "field_short_name" => null
                            "field_subject_type" => "technical_subject"
                            "field_translit" => "geometrija"
                          ]
                          #original: array:10 [
                            "id" => 6477
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "Геометрия"
                            "field_abbreviated_name" => null
                            "field_cases" => array:6 [
                              "field_accusative_case" => "геометрию"
                              "field_creative_case" => "геометрией"
                              "field_dative_case" => "геометрии"
                              "field_genitive_case" => "геометрии"
                              "field_nominative_case" => "геометрия"
                              "field_prepositional_case" => "геометрии"
                            ]
                            "field_foreign_lang_name" => null
                            "field_short_name" => null
                            "field_subject_type" => "technical_subject"
                            "field_translit" => "geometrija"
                          ]
                          #changes: []
                          #casts: []
                          #classCastCache: []
                          #attributeCastCache: []
                          #dateFormat: null
                          #appends: []
                          #dispatchesEvents: []
                          #observables: []
                          #relations: []
                          #touches: []
                          +timestamps: true
                          +usesUniqueIds: false
                          #hidden: []
                          #visible: []
                          #fillable: []
                          #guarded: array:1 [
                            0 => "*"
                          ]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_class" => Illuminate\Database\Eloquent\Collection {#1117
                      #items: array:1 [
                        0 => App\Models\Term {#1118
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
                          #with: []
                          #withCount: []
                          +preventsLazyLoading: false
                          #perPage: 15
                          +exists: true
                          +wasRecentlyCreated: false
                          #escapeWhenCastingToString: false
                          #attributes: array:6 [
                            "id" => 5456
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "7"
                            "field_cases" => array:6 [
                              "field_accusative_case" => "седьмой"
                              "field_creative_case" => "седьмым"
                              "field_dative_case" => "седьмому"
                              "field_genitive_case" => "седьмого"
                              "field_nominative_case" => "седьмой"
                              "field_prepositional_case" => "седьмом"
                            ]
                            "field_translit" => "sedmoj"
                          ]
                          #original: array:6 [
                            "id" => 5456
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "7"
                            "field_cases" => array:6 [
                              "field_accusative_case" => "седьмой"
                              "field_creative_case" => "седьмым"
                              "field_dative_case" => "седьмому"
                              "field_genitive_case" => "седьмого"
                              "field_nominative_case" => "седьмой"
                              "field_prepositional_case" => "седьмом"
                            ]
                            "field_translit" => "sedmoj"
                          ]
                          #changes: []
                          #casts: []
                          #classCastCache: []
                          #attributeCastCache: []
                          #dateFormat: null
                          #appends: []
                          #dispatchesEvents: []
                          #observables: []
                          #relations: []
                          #touches: []
                          +timestamps: true
                          +usesUniqueIds: false
                          #hidden: []
                          #visible: []
                          #fillable: []
                          #guarded: array:1 [
                            0 => "*"
                          ]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1119
                      #items: array:1 [
                        0 => App\Models\Term {#1120
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
                          #with: []
                          #withCount: []
                          +preventsLazyLoading: false
                          #perPage: 15
                          +exists: true
                          +wasRecentlyCreated: false
                          #escapeWhenCastingToString: false
                          #attributes: array:6 [
                            "id" => 6996
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "Мектеп"
                            "field_cases" => array:6 [
                              "field_accusative_case" => null
                              "field_creative_case" => null
                              "field_dative_case" => null
                              "field_genitive_case" => null
                              "field_nominative_case" => null
                              "field_prepositional_case" => null
                            ]
                            "field_translit" => "mektep"
                          ]
                          #original: array:6 [
                            "id" => 6996
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "Мектеп"
                            "field_cases" => array:6 [
                              "field_accusative_case" => null
                              "field_creative_case" => null
                              "field_dative_case" => null
                              "field_genitive_case" => null
                              "field_nominative_case" => null
                              "field_prepositional_case" => null
                            ]
                            "field_translit" => "mektep"
                          ]
                          #changes: []
                          #casts: []
                          #classCastCache: []
                          #attributeCastCache: []
                          #dateFormat: null
                          #appends: []
                          #dispatchesEvents: []
                          #observables: []
                          #relations: []
                          #touches: []
                          +timestamps: true
                          +usesUniqueIds: false
                          #hidden: []
                          #visible: []
                          #fillable: []
                          #guarded: array:1 [
                            0 => "*"
                          ]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_author" => Illuminate\Database\Eloquent\Collection {#1121
                      #items: array:2 [
                        0 => App\Models\Term {#1122
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
                          #with: []
                          #withCount: []
                          +preventsLazyLoading: false
                          #perPage: 15
                          +exists: true
                          +wasRecentlyCreated: false
                          #escapeWhenCastingToString: false
                          #attributes: array:12 [
                            "id" => 5801
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "Смирнов"
                            "field_bio" => null
                            "field_degree_rp" => null
                            "field_foreign_lang_name" => null
                            "field_foreign_lang_patronymic" => null
                            "field_foreign_lang_surname" => null
                            "field_name" => "Владимир"
                            "field_patronymic" => "Алексеевич"
                            "field_surname_rp" => null
                          ]
                          #original: array:12 [
                            "id" => 5801
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "Смирнов"
                            "field_bio" => null
                            "field_degree_rp" => null
                            "field_foreign_lang_name" => null
                            "field_foreign_lang_patronymic" => null
                            "field_foreign_lang_surname" => null
                            "field_name" => "Владимир"
                            "field_patronymic" => "Алексеевич"
                            "field_surname_rp" => null
                          ]
                          #changes: []
                          #casts: []
                          #classCastCache: []
                          #attributeCastCache: []
                          #dateFormat: null
                          #appends: []
                          #dispatchesEvents: []
                          #observables: []
                          #relations: []
                          #touches: []
                          +timestamps: true
                          +usesUniqueIds: false
                          #hidden: []
                          #visible: []
                          #fillable: []
                          #guarded: array:1 [
                            0 => "*"
                          ]
                        }
                        1 => App\Models\Term {#1123
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
                          #with: []
                          #withCount: []
                          +preventsLazyLoading: false
                          #perPage: 15
                          +exists: true
                          +wasRecentlyCreated: false
                          #escapeWhenCastingToString: false
                          #attributes: array:12 [
                            "id" => 7017
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "Туяков"
                            "field_bio" => null
                            "field_degree_rp" => null
                            "field_foreign_lang_name" => null
                            "field_foreign_lang_patronymic" => null
                            "field_foreign_lang_surname" => null
                            "field_name" => "Есенкельды"
                            "field_patronymic" => "Алыбаевич"
                            "field_surname_rp" => null
                          ]
                          #original: array:12 [
                            "id" => 7017
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "Туяков"
                            "field_bio" => null
                            "field_degree_rp" => null
                            "field_foreign_lang_name" => null
                            "field_foreign_lang_patronymic" => null
                            "field_foreign_lang_surname" => null
                            "field_name" => "Есенкельды"
                            "field_patronymic" => "Алыбаевич"
                            "field_surname_rp" => null
                          ]
                          #changes: []
                          #casts: []
                          #classCastCache: []
                          #attributeCastCache: []
                          #dateFormat: null
                          #appends: []
                          #dispatchesEvents: []
                          #observables: []
                          #relations: []
                          #touches: []
                          +timestamps: true
                          +usesUniqueIds: false
                          #hidden: []
                          #visible: []
                          #fillable: []
                          #guarded: array:1 [
                            0 => "*"
                          ]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1124
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_book_type" => Illuminate\Database\Eloquent\Collection {#1125
                      #items: array:1 [
                        0 => App\Models\Term {#1126
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
                          #with: []
                          #withCount: []
                          +preventsLazyLoading: false
                          #perPage: 15
                          +exists: true
                          +wasRecentlyCreated: false
                          #escapeWhenCastingToString: false
                          #attributes: array:10 [
                            "id" => 6671
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "Учебник"
                            "field_book_type_foreign" => null
                            "field_cases" => array:6 [
                              "field_accusative_case" => "учебник"
                              "field_creative_case" => "учебником"
                              "field_dative_case" => "учебнику"
                              "field_genitive_case" => "учебника"
                              "field_nominative_case" => "учебник"
                              "field_prepositional_case" => "учебнике"
                            ]
                            "field_plural_form" => null
                            "field_short_name" => null
                            "field_short_name_foreign" => null
                            "field_translit" => "uchebnik"
                          ]
                          #original: array:10 [
                            "id" => 6671
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "Учебник"
                            "field_book_type_foreign" => null
                            "field_cases" => array:6 [
                              "field_accusative_case" => "учебник"
                              "field_creative_case" => "учебником"
                              "field_dative_case" => "учебнику"
                              "field_genitive_case" => "учебника"
                              "field_nominative_case" => "учебник"
                              "field_prepositional_case" => "учебнике"
                            ]
                            "field_plural_form" => null
                            "field_short_name" => null
                            "field_short_name_foreign" => null
                            "field_translit" => "uchebnik"
                          ]
                          #changes: []
                          #casts: []
                          #classCastCache: []
                          #attributeCastCache: []
                          #dateFormat: null
                          #appends: []
                          #dispatchesEvents: []
                          #observables: []
                          #relations: []
                          #touches: []
                          +timestamps: true
                          +usesUniqueIds: false
                          #hidden: []
                          #visible: []
                          #fillable: []
                          #guarded: array:1 [
                            0 => "*"
                          ]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_country" => Illuminate\Database\Eloquent\Collection {#1127
                      #items: array:1 [
                        0 => App\Models\Term {#1128
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
                          #with: []
                          #withCount: []
                          +preventsLazyLoading: false
                          #perPage: 15
                          +exists: true
                          +wasRecentlyCreated: false
                          #escapeWhenCastingToString: false
                          #attributes: array:6 [
                            "id" => 6994
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "Казахстан"
                            "field_cases" => array:6 [
                              "field_accusative_case" => null
                              "field_creative_case" => null
                              "field_dative_case" => null
                              "field_genitive_case" => null
                              "field_nominative_case" => null
                              "field_prepositional_case" => null
                            ]
                            "field_translit" => "kazakhstan"
                          ]
                          #original: array:6 [
                            "id" => 6994
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "Казахстан"
                            "field_cases" => array:6 [
                              "field_accusative_case" => null
                              "field_creative_case" => null
                              "field_dative_case" => null
                              "field_genitive_case" => null
                              "field_nominative_case" => null
                              "field_prepositional_case" => null
                            ]
                            "field_translit" => "kazakhstan"
                          ]
                          #changes: []
                          #casts: []
                          #classCastCache: []
                          #attributeCastCache: []
                          #dateFormat: null
                          #appends: []
                          #dispatchesEvents: []
                          #observables: []
                          #relations: []
                          #touches: []
                          +timestamps: true
                          +usesUniqueIds: false
                          #hidden: []
                          #visible: []
                          #fillable: []
                          #guarded: array:1 [
                            0 => "*"
                          ]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_city" => Illuminate\Database\Eloquent\Collection {#1129
                      #items: array:1 [
                        0 => App\Models\Term {#1130
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
                          #with: []
                          #withCount: []
                          +preventsLazyLoading: false
                          #perPage: 15
                          +exists: true
                          +wasRecentlyCreated: false
                          #escapeWhenCastingToString: false
                          #attributes: array:6 [
                            "id" => 6995
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "Алматы"
                            "field_cases" => array:6 [
                              "field_accusative_case" => null
                              "field_creative_case" => null
                              "field_dative_case" => null
                              "field_genitive_case" => null
                              "field_nominative_case" => null
                              "field_prepositional_case" => null
                            ]
                            "field_translit" => "almaty"
                          ]
                          #original: array:6 [
                            "id" => 6995
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "Алматы"
                            "field_cases" => array:6 [
                              "field_accusative_case" => null
                              "field_creative_case" => null
                              "field_dative_case" => null
                              "field_genitive_case" => null
                              "field_nominative_case" => null
                              "field_prepositional_case" => null
                            ]
                            "field_translit" => "almaty"
                          ]
                          #changes: []
                          #casts: []
                          #classCastCache: []
                          #attributeCastCache: []
                          #dateFormat: null
                          #appends: []
                          #dispatchesEvents: []
                          #observables: []
                          #relations: []
                          #touches: []
                          +timestamps: true
                          +usesUniqueIds: false
                          #hidden: []
                          #visible: []
                          #fillable: []
                          #guarded: array:1 [
                            0 => "*"
                          ]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_series" => Illuminate\Database\Eloquent\Collection {#1131
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_umk" => Illuminate\Database\Eloquent\Collection {#1132
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1133
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1134
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_publication_number" => null
                    "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1135
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1136
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_under_the_edition_degree" => null
                    "field_cover_description" => null
                    "field_publication_year" => "2017"
                    "field_publication_year_until" => null
                    "field_part" => ""
                    "field_part_writing" => ""
                    "field_second_foreign_language" => null
                    "field_for_whom" => "Учебник для 7 класса общеобразовательной школы"
                    "field_allowed" => "Утверждено Министерством образования и науки Республики Казахстан"
                    "field_reserve_field" => null
                    "field_link_to_source" => null
                    "field_tasks_count" => "528"
                    "field_priority" => "2"
                    "field_default_folder" => "/geometrija_07/Smirnova-u17/"
                    "field_isbn" => "978-601-07-0873-0"
                    "field_cover" => array:1 [
                      0 => "/media/geometrija_07/Smirnova-u17/covers/cover1.webp?ts=1753259592"
                    ]
                    "field_cover_alts" => array:1 [
                      0 => ""
                    ]
                    "field_covers" => array:1 [
                      0 => array:4 [
                        "path" => "/media/geometrija_07/Smirnova-u17/covers/cover1.webp?ts=1753259592"
                        "alt" => ""
                        "width" => "1632"
                        "height" => "2472"
                      ]
                    ]
                    "field_popular_book" => null
                    "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1137
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_new_book" => Illuminate\Database\Eloquent\Collection {#1138
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_old_book" => Illuminate\Database\Eloquent\Collection {#1139
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_url" => "/7-klass/geometrija/smirnova-uchebnik"
                    "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1140
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_metatags_title" => null
                    "field_metatags_description" => null
                    "field_h1" => null
                    "field_description_top" => null
                    "field_description_bottom" => null
                    "breadcrumbs" => array:3 [
                      "class" => 378
                      "subject" => 543
                      "class_subject" => 389
                    ]
                  ]
                  #original: array:50 [
                    "id" => 2907
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "field_tree_default_status" => "tasks"
                    "field_pages_status" => null
                    "field_subject" => Illuminate\Database\Eloquent\Collection {#1116}
                    "field_class" => Illuminate\Database\Eloquent\Collection {#1117}
                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1119}
                    "field_author" => Illuminate\Database\Eloquent\Collection {#1121}
                    "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1124}
                    "field_book_type" => Illuminate\Database\Eloquent\Collection {#1125}
                    "field_country" => Illuminate\Database\Eloquent\Collection {#1127}
                    "field_city" => Illuminate\Database\Eloquent\Collection {#1129}
                    "field_series" => Illuminate\Database\Eloquent\Collection {#1131}
                    "field_umk" => Illuminate\Database\Eloquent\Collection {#1132}
                    "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1133}
                    "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1134}
                    "field_publication_number" => null
                    "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1135}
                    "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1136}
                    "field_under_the_edition_degree" => null
                    "field_cover_description" => null
                    "field_publication_year" => "2017"
                    "field_publication_year_until" => null
                    "field_part" => ""
                    "field_part_writing" => ""
                    "field_second_foreign_language" => null
                    "field_for_whom" => "Учебник для 7 класса общеобразовательной школы"
                    "field_allowed" => "Утверждено Министерством образования и науки Республики Казахстан"
                    "field_reserve_field" => null
                    "field_link_to_source" => null
                    "field_tasks_count" => "528"
                    "field_priority" => "2"
                    "field_default_folder" => "/geometrija_07/Smirnova-u17/"
                    "field_isbn" => "978-601-07-0873-0"
                    "field_cover" => array:1 [
                      0 => "/media/geometrija_07/Smirnova-u17/covers/cover1.webp?ts=1753259592"
                    ]
                    "field_cover_alts" => array:1 [
                      0 => ""
                    ]
                    "field_covers" => array:1 [
                      0 => array:4 [
                        "path" => "/media/geometrija_07/Smirnova-u17/covers/cover1.webp?ts=1753259592"
                        "alt" => ""
                        "width" => "1632"
                        "height" => "2472"
                      ]
                    ]
                    "field_popular_book" => null
                    "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1137}
                    "field_new_book" => Illuminate\Database\Eloquent\Collection {#1138}
                    "field_old_book" => Illuminate\Database\Eloquent\Collection {#1139}
                    "field_url" => "/7-klass/geometrija/smirnova-uchebnik"
                    "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1140}
                    "field_metatags_title" => null
                    "field_metatags_description" => null
                    "field_h1" => null
                    "field_description_top" => null
                    "field_description_bottom" => null
                    "breadcrumbs" => array:3 [
                      "class" => 378
                      "subject" => 543
                      "class_subject" => 389
                    ]
                  ]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1141
              #items: []
              #escapeWhenCastingToString: false
            }
          ]
          #original: array:24 [
            "id" => 1129379
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => "Окружность. Геометрические построения"
            "field_branch_order" => "4"
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1115}
            "field_page_start" => "101"
            "field_branch_display" => "0"
            "field_branch_expanded" => "0"
            "field_display_branch_in_title" => "1"
            "field_display_task_interval" => "0"
            "field_display_branch_page" => "1"
            "field_branch_title_in_content" => "0"
            "field_navigation_title" => null
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_branch_cover" => []
            "field_branch_covers" => []
            "book" => Illuminate\Database\Eloquent\Collection {#1143}
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1141}
          ]
          #changes: []
          #casts: []
          #classCastCache: []
          #attributeCastCache: []
          #dateFormat: null
          #appends: []
          #dispatchesEvents: []
          #observables: []
          #relations: []
          #touches: []
          +timestamps: true
          +usesUniqueIds: false
          #hidden: []
          #visible: []
          #fillable: []
          #guarded: array:1 [
            0 => "*"
          ]
        }
        1 => App\Models\Branch {#1142
          #connection: "mysql"
          #table: "branches"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
          +preventsLazyLoading: false
          #perPage: 15
          +exists: true
          +wasRecentlyCreated: false
          #escapeWhenCastingToString: false
          #attributes: array:24 [
            "id" => 1129384
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => "Окружность, описанная около треугольника. Окружность, вписанная в треугольник"
            "field_branch_order" => "22"
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1147
              #items: array:1 [
                0 => App\Models\Term {#1144
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:7 [
                    "id" => 32
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "Параграф"
                    "field_cases" => array:6 [
                      "field_accusative_case" => "Параграф"
                      "field_creative_case" => "Параграфом"
                      "field_dative_case" => "Параграфу"
                      "field_genitive_case" => "Параграфа"
                      "field_nominative_case" => "Параграф"
                      "field_prepositional_case" => "Параграфе"
                    ]
                    "field_page_check_not_needed" => null
                    "field_short_name" => "§"
                  ]
                  #original: array:7 [
                    "id" => 32
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "Параграф"
                    "field_cases" => array:6 [
                      "field_accusative_case" => "Параграф"
                      "field_creative_case" => "Параграфом"
                      "field_dative_case" => "Параграфу"
                      "field_genitive_case" => "Параграфа"
                      "field_nominative_case" => "Параграф"
                      "field_prepositional_case" => "Параграфе"
                    ]
                    "field_page_check_not_needed" => null
                    "field_short_name" => "§"
                  ]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "field_page_start" => "123"
            "field_branch_display" => "0"
            "field_branch_expanded" => "0"
            "field_display_branch_in_title" => "1"
            "field_display_task_interval" => "0"
            "field_display_branch_page" => "1"
            "field_branch_title_in_content" => "0"
            "field_navigation_title" => null
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_branch_cover" => []
            "field_branch_covers" => []
            "book" => Illuminate\Database\Eloquent\Collection {#1146
              #items: array:1 [
                0 => App\Models\Book {#1114}
              ]
              #escapeWhenCastingToString: false
            }
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1145
              #items: array:1 [
                0 => App\Models\Branch {#1035}
              ]
              #escapeWhenCastingToString: false
            }
          ]
          #original: array:24 [
            "id" => 1129384
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => "Окружность, описанная около треугольника. Окружность, вписанная в треугольник"
            "field_branch_order" => "22"
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1147}
            "field_page_start" => "123"
            "field_branch_display" => "0"
            "field_branch_expanded" => "0"
            "field_display_branch_in_title" => "1"
            "field_display_task_interval" => "0"
            "field_display_branch_page" => "1"
            "field_branch_title_in_content" => "0"
            "field_navigation_title" => null
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_branch_cover" => []
            "field_branch_covers" => []
            "book" => Illuminate\Database\Eloquent\Collection {#1146}
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1145}
          ]
          #changes: []
          #casts: []
          #classCastCache: []
          #attributeCastCache: []
          #dateFormat: null
          #appends: []
          #dispatchesEvents: []
          #observables: []
          #relations: []
          #touches: []
          +timestamps: true
          +usesUniqueIds: false
          #hidden: []
          #visible: []
          #fillable: []
          #guarded: array:1 [
            0 => "*"
          ]
        }
      ]
      #escapeWhenCastingToString: false
    }
    "content" => Illuminate\Database\Eloquent\Collection {#1100
      #items: array:3 [
        0 => App\Models\Element {#1093
          #connection: "mysql"
          #table: "elements"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
          +preventsLazyLoading: false
          #perPage: 15
          +exists: true
          +wasRecentlyCreated: false
          #escapeWhenCastingToString: false
          #attributes: array:7 [
            "id" => 1320138
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "edition" => Illuminate\Database\Eloquent\Collection {#1085
              #items: array:1 [
                0 => App\Models\Edition {#1092
                  #connection: "mysql"
                  #table: "editions"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:21 [
                    "id" => 5009
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "title" => "Условие"
                    "field_order" => "1"
                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1090
                      #items: array:1 [
                        0 => App\Models\Term {#1091
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
                          #with: []
                          #withCount: []
                          +preventsLazyLoading: false
                          #perPage: 15
                          +exists: true
                          +wasRecentlyCreated: false
                          #escapeWhenCastingToString: false
                          #attributes: array:6 [
                            "id" => 6996
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "Мектеп"
                            "field_cases" => array:6 [ …6]
                            "field_translit" => "mektep"
                          ]
                          #original: array:6 [
                            "id" => 6996
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "Мектеп"
                            "field_cases" => array:6 [ …6]
                            "field_translit" => "mektep"
                          ]
                          #changes: []
                          #casts: []
                          #classCastCache: []
                          #attributeCastCache: []
                          #dateFormat: null
                          #appends: []
                          #dispatchesEvents: []
                          #observables: []
                          #relations: []
                          #touches: []
                          +timestamps: true
                          +usesUniqueIds: false
                          #hidden: []
                          #visible: []
                          #fillable: []
                          #guarded: array:1 [
                            0 => "*"
                          ]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
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            "text" => "<p>Как вы думаете, около всякого ли треугольника можно описать окружность?</p><p>Изобразите окружности, описанные около остроугольного и тупоугольного треугольников.</p><p>Как вы думаете, во всякий ли треугольник можно вписать окружность?</p><p>Изобразите окружности, вписанные в остроугольный и тупоугольный треугольники.</p>"
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            "text" => "<p><strong>Как вы думаете, около всякого ли треугольника можно описать окружность?</strong></p><p>Да, около любого треугольника можно описать окружность, причём только одну. Центр этой окружности является точкой пересечения серединных перпендикуляров к сторонам треугольника. Серединный перпендикуляр – это прямая, проходящая через середину стороны перпендикулярно ей. Все три серединных перпендикуляра треугольника всегда пересекаются в одной точке. Эта точка равноудалена от всех трёх вершин треугольника. Расстояние от этой точки до любой из вершин является радиусом описанной окружности. Формула для радиуса описанной окружности $R$ через стороны треугольника $a, b, c$ и его площадь $S$ выглядит так: $R = \frac{abc}{4S}$.</p><p><strong>Ответ:</strong> Да, около всякого треугольника можно описать окружность.</p><p><strong>Изобразите окружности, описанные около остроугольного и тупоугольного треугольников.</strong></p><p>Центр описанной окружности остроугольного треугольника лежит внутри треугольника. Центр описанной окружности тупоугольного треугольника находится вне треугольника. (Для справки: центр описанной окружности прямоугольного треугольника лежит на середине гипотенузы).</p><p><em>Окружность, описанная около остроугольного треугольника (центр О - внутри):</em></p><svg width="300" height="220" viewBox="0 0 300 220" xmlns="http://www.w3.org/2000/svg"><style> .triangle { fill: rgba(135, 206, 250, 0.3); stroke: navy; stroke-width: 2; } .circle { fill: none; stroke: orangered; stroke-width: 2; } .bisector { stroke: gray; stroke-width: 1; stroke-dasharray: 4 2; } .point { fill: black; } .label { font-family: sans-serif; font-size: 14px; } </style><circle class="circle" cx="150" cy="115" r="85"/><polygon class="triangle" points="150,30 65,140 235,140"/><line class="bisector" x1="150" y1="180" x2="150" y2="30"/><line class="bisector" x1="50" y1="50" x2="250" y2="150"/><line class="bisector" x1="250" y1="50" x2="50" y2="150"/><circle class="point" cx="150" cy="115" r="3"/><text class="label" x="145" y="110">O</text><text class="label" x="145" y="25">C</text><text class="label" x="50" y="145">A</text><text class="label" x="240" y="145">B</text></svg><p><em>Окружность, описанная около тупоугольного треугольника (центр О - вне):</em></p><svg width="300" height="250" viewBox="0 0 320 250" xmlns="http://www.w3.org/2000/svg"><style> .triangle { fill: rgba(255, 165, 0, 0.3); stroke: darkred; stroke-width: 2; } .circle { fill: none; stroke: steelblue; stroke-width: 2; } .bisector { stroke: gray; stroke-width: 1; stroke-dasharray: 4 2; } .point { fill: black; } .label { font-family: sans-serif; font-size: 14px; } </style><circle class="circle" cx="160" cy="190" r="111.8"/><polygon class="triangle" points="70,100 250,100 50,150"/><line class="bisector" x1="160" y1="0" x2="160" y2="220"/><line class="bisector" x1="30" y1="215" x2="290" y2="165"/><line class="bisector" x1="10" y1="100" x2="200" y2="250"/><circle class="point" cx="160" cy="190" r="3"/><text class="label" x="165" y="205">O</text><text class="label" x="65" y="95">A</text><text class="label" x="255" y="105">B</text><text class="label" x="40" y="165">C</text></svg><p><strong>Ответ:</strong> Изображения представлены выше. На них показано расположение центра описанной окружности для остроугольного и тупоугольного треугольников.</p><p><strong>Как вы думаете, во всякий ли треугольник можно вписать окружность?</strong></p><p>Да, в любой треугольник можно вписать окружность, причём только одну. Центр этой окружности, называемый инцентром, является точкой пересечения биссектрис углов треугольника. Биссектриса — это луч, выходящий из вершины угла и делящий его пополам. Три биссектрисы треугольника всегда пересекаются в одной точке внутри треугольника. Эта точка равноудалена от всех трёх сторон треугольника. Расстояние от инцентра до любой из сторон является радиусом вписанной окружности. Формула для радиуса вписанной окружности $r$ через площадь $S$ и полупериметр $p = (a+b+c)/2$ выглядит так: $r = \frac{S}{p}$.</p><p><strong>Ответ:</strong> Да, во всякий треугольник можно вписать окружность.</p><p><strong>Изобразите окружности, вписанные в остроугольный и тупоугольный треугольники.</strong></p><p>Центр вписанной окружности (инцентр) всегда находится внутри треугольника, независимо от его вида (остроугольный, прямоугольный или тупоугольный).</p><p><em>Окружность, вписанная в остроугольный треугольник (центр I - внутри):</em></p><svg width="300" height="220" viewBox="0 0 300 220" xmlns="http://www.w3.org/2000/svg"><style> .triangle { fill: rgba(144, 238, 144, 0.3); stroke: darkgreen; stroke-width: 2; } .circle { fill: none; stroke: darkviolet; stroke-width: 2; } .bisector { stroke: gray; stroke-width: 1; stroke-dasharray: 4 2; } .point { fill: black; } .label { font-family: sans-serif; font-size: 14px; } </style><polygon class="triangle" points="150,30 65,180 235,180"/><circle class="circle" cx="150" cy="130" r="50"/><line class="bisector" x1="150" y1="30" x2="150" y2="180"/><line class="bisector" x1="65" y1="180" x2="185" y2="90"/><line class="bisector" x1="235" y1="180" x2="115" y2="90"/><circle class="point" cx="150" cy="130" r="3"/><text class="label" x="155" y="128">I</text><text class="label" x="145" y="25">C</text><text class="label" x="50" y="185">A</text><text class="label" x="240" y="185">B</text></svg><p><em>Окружность, вписанная в тупоугольный треугольник (центр I - внутри):</em></p><svg width="300" height="220" viewBox="0 0 300 220" xmlns="http://www.w3.org/2000/svg"><style> .triangle { fill: rgba(255, 182, 193, 0.3); stroke: darkmagenta; stroke-width: 2; } .circle { fill: none; stroke: teal; stroke-width: 2; } .bisector { stroke: gray; stroke-width: 1; stroke-dasharray: 4 2; } .point { fill: black; } .label { font-family: sans-serif; font-size: 14px; } </style><polygon class="triangle" points="70,180 270,180 100,60"/><circle class="circle" cx="127" cy="147" r="33"/><line class="bisector" x1="100" y1="60" x2="140" y2="190"/><line class="bisector" x1="70" y1="180" x2="110" y2="100"/><line class="bisector" x1="270" y1="180" x2="90" y2="135"/><circle class="point" cx="127" cy="147" r="3"/><text class="label" x="132" y="145">I</text><text class="label" x="90" y="55">C</text><text class="label" x="55" y="185">A</text><text class="label" x="275" y="185">B</text></svg><p><strong>Ответ:</strong> Изображения представлены выше. Они показывают, что центр вписанной окружности всегда находится внутри треугольника.</p>"
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            "text" => "<p><strong>Как вы думаете, около всякого ли треугольника можно описать окружность?</strong></p><p>Да, около любого треугольника можно описать окружность, причём только одну. Центр этой окружности является точкой пересечения серединных перпендикуляров к сторонам треугольника. Серединный перпендикуляр – это прямая, проходящая через середину стороны перпендикулярно ей. Все три серединных перпендикуляра треугольника всегда пересекаются в одной точке. Эта точка равноудалена от всех трёх вершин треугольника. Расстояние от этой точки до любой из вершин является радиусом описанной окружности. Формула для радиуса описанной окружности $R$ через стороны треугольника $a, b, c$ и его площадь $S$ выглядит так: $R = \frac{abc}{4S}$.</p><p><strong>Ответ:</strong> Да, около всякого треугольника можно описать окружность.</p><p><strong>Изобразите окружности, описанные около остроугольного и тупоугольного треугольников.</strong></p><p>Центр описанной окружности остроугольного треугольника лежит внутри треугольника. Центр описанной окружности тупоугольного треугольника находится вне треугольника. (Для справки: центр описанной окружности прямоугольного треугольника лежит на середине гипотенузы).</p><p><em>Окружность, описанная около остроугольного треугольника (центр О - внутри):</em></p><svg width="300" height="220" viewBox="0 0 300 220" xmlns="http://www.w3.org/2000/svg"><style> .triangle { fill: rgba(135, 206, 250, 0.3); stroke: navy; stroke-width: 2; } .circle { fill: none; stroke: orangered; stroke-width: 2; } .bisector { stroke: gray; stroke-width: 1; stroke-dasharray: 4 2; } .point { fill: black; } .label { font-family: sans-serif; font-size: 14px; } </style><circle class="circle" cx="150" cy="115" r="85"/><polygon class="triangle" points="150,30 65,140 235,140"/><line class="bisector" x1="150" y1="180" x2="150" y2="30"/><line class="bisector" x1="50" y1="50" x2="250" y2="150"/><line class="bisector" x1="250" y1="50" x2="50" y2="150"/><circle class="point" cx="150" cy="115" r="3"/><text class="label" x="145" y="110">O</text><text class="label" x="145" y="25">C</text><text class="label" x="50" y="145">A</text><text class="label" x="240" y="145">B</text></svg><p><em>Окружность, описанная около тупоугольного треугольника (центр О - вне):</em></p><svg width="300" height="250" viewBox="0 0 320 250" xmlns="http://www.w3.org/2000/svg"><style> .triangle { fill: rgba(255, 165, 0, 0.3); stroke: darkred; stroke-width: 2; } .circle { fill: none; stroke: steelblue; stroke-width: 2; } .bisector { stroke: gray; stroke-width: 1; stroke-dasharray: 4 2; } .point { fill: black; } .label { font-family: sans-serif; font-size: 14px; } </style><circle class="circle" cx="160" cy="190" r="111.8"/><polygon class="triangle" points="70,100 250,100 50,150"/><line class="bisector" x1="160" y1="0" x2="160" y2="220"/><line class="bisector" x1="30" y1="215" x2="290" y2="165"/><line class="bisector" x1="10" y1="100" x2="200" y2="250"/><circle class="point" cx="160" cy="190" r="3"/><text class="label" x="165" y="205">O</text><text class="label" x="65" y="95">A</text><text class="label" x="255" y="105">B</text><text class="label" x="40" y="165">C</text></svg><p><strong>Ответ:</strong> Изображения представлены выше. На них показано расположение центра описанной окружности для остроугольного и тупоугольного треугольников.</p><p><strong>Как вы думаете, во всякий ли треугольник можно вписать окружность?</strong></p><p>Да, в любой треугольник можно вписать окружность, причём только одну. Центр этой окружности, называемый инцентром, является точкой пересечения биссектрис углов треугольника. Биссектриса — это луч, выходящий из вершины угла и делящий его пополам. Три биссектрисы треугольника всегда пересекаются в одной точке внутри треугольника. Эта точка равноудалена от всех трёх сторон треугольника. Расстояние от инцентра до любой из сторон является радиусом вписанной окружности. Формула для радиуса вписанной окружности $r$ через площадь $S$ и полупериметр $p = (a+b+c)/2$ выглядит так: $r = \frac{S}{p}$.</p><p><strong>Ответ:</strong> Да, во всякий треугольник можно вписать окружность.</p><p><strong>Изобразите окружности, вписанные в остроугольный и тупоугольный треугольники.</strong></p><p>Центр вписанной окружности (инцентр) всегда находится внутри треугольника, независимо от его вида (остроугольный, прямоугольный или тупоугольный).</p><p><em>Окружность, вписанная в остроугольный треугольник (центр I - внутри):</em></p><svg width="300" height="220" viewBox="0 0 300 220" xmlns="http://www.w3.org/2000/svg"><style> .triangle { fill: rgba(144, 238, 144, 0.3); stroke: darkgreen; stroke-width: 2; } .circle { fill: none; stroke: darkviolet; stroke-width: 2; } .bisector { stroke: gray; stroke-width: 1; stroke-dasharray: 4 2; } .point { fill: black; } .label { font-family: sans-serif; font-size: 14px; } </style><polygon class="triangle" points="150,30 65,180 235,180"/><circle class="circle" cx="150" cy="130" r="50"/><line class="bisector" x1="150" y1="30" x2="150" y2="180"/><line class="bisector" x1="65" y1="180" x2="185" y2="90"/><line class="bisector" x1="235" y1="180" x2="115" y2="90"/><circle class="point" cx="150" cy="130" r="3"/><text class="label" x="155" y="128">I</text><text class="label" x="145" y="25">C</text><text class="label" x="50" y="185">A</text><text class="label" x="240" y="185">B</text></svg><p><em>Окружность, вписанная в тупоугольный треугольник (центр I - внутри):</em></p><svg width="300" height="220" viewBox="0 0 300 220" xmlns="http://www.w3.org/2000/svg"><style> .triangle { fill: rgba(255, 182, 193, 0.3); stroke: darkmagenta; stroke-width: 2; } .circle { fill: none; stroke: teal; stroke-width: 2; } .bisector { stroke: gray; stroke-width: 1; stroke-dasharray: 4 2; } .point { fill: black; } .label { font-family: sans-serif; font-size: 14px; } </style><polygon class="triangle" points="70,180 270,180 100,60"/><circle class="circle" cx="127" cy="147" r="33"/><line class="bisector" x1="100" y1="60" x2="140" y2="190"/><line class="bisector" x1="70" y1="180" x2="110" y2="100"/><line class="bisector" x1="270" y1="180" x2="90" y2="135"/><circle class="point" cx="127" cy="147" r="3"/><text class="label" x="132" y="145">I</text><text class="label" x="90" y="55">C</text><text class="label" x="55" y="185">A</text><text class="label" x="275" y="185">B</text></svg><p><strong>Ответ:</strong> Изображения представлены выше. Они показывают, что центр вписанной окружности всегда находится внутри треугольника.</p>"
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Задания (с. 124)
Условие. Задания (с. 124)
скриншот условия
Геометрия, 7 класс Учебник, авторы: Смирнов Владимир Алексеевич, Туяков Есенкельды Алыбаевич, издательство Мектеп, Алматы, 2017, страница 124, Условие
Геометрия, 7 класс Учебник, авторы: Смирнов Владимир Алексеевич, Туяков Есенкельды Алыбаевич, издательство Мектеп, Алматы, 2017, страница 124, Условие (продолжение 2)
Геометрия, 7 класс Учебник, авторы: Смирнов Владимир Алексеевич, Туяков Есенкельды Алыбаевич, издательство Мектеп, Алматы, 2017, страница 124, Условие (продолжение 3)
Геометрия, 7 класс Учебник, авторы: Смирнов Владимир Алексеевич, Туяков Есенкельды Алыбаевич, издательство Мектеп, Алматы, 2017, страница 124, Условие (продолжение 4)

Как вы думаете, около всякого ли треугольника можно описать окружность?

Изобразите окружности, описанные около остроугольного и тупоугольного треугольников.

Как вы думаете, во всякий ли треугольник можно вписать окружность?

Изобразите окружности, вписанные в остроугольный и тупоугольный треугольники.

Решение. Задания (с. 124)
Геометрия, 7 класс Учебник, авторы: Смирнов Владимир Алексеевич, Туяков Есенкельды Алыбаевич, издательство Мектеп, Алматы, 2017, страница 124, Решение
Геометрия, 7 класс Учебник, авторы: Смирнов Владимир Алексеевич, Туяков Есенкельды Алыбаевич, издательство Мектеп, Алматы, 2017, страница 124, Решение (продолжение 2)
Решение 2. Задания (с. 124)

Как вы думаете, около всякого ли треугольника можно описать окружность?

Да, около любого треугольника можно описать окружность, причём только одну. Центр этой окружности является точкой пересечения серединных перпендикуляров к сторонам треугольника. Серединный перпендикуляр – это прямая, проходящая через середину стороны перпендикулярно ей. Все три серединных перпендикуляра треугольника всегда пересекаются в одной точке. Эта точка равноудалена от всех трёх вершин треугольника. Расстояние от этой точки до любой из вершин является радиусом описанной окружности. Формула для радиуса описанной окружности $R$ через стороны треугольника $a, b, c$ и его площадь $S$ выглядит так: $R = \frac{abc}{4S}$.

Ответ: Да, около всякого треугольника можно описать окружность.

Изобразите окружности, описанные около остроугольного и тупоугольного треугольников.

Центр описанной окружности остроугольного треугольника лежит внутри треугольника. Центр описанной окружности тупоугольного треугольника находится вне треугольника. (Для справки: центр описанной окружности прямоугольного треугольника лежит на середине гипотенузы).

Окружность, описанная около остроугольного треугольника (центр О - внутри):

OCAB

Окружность, описанная около тупоугольного треугольника (центр О - вне):

OABC

Ответ: Изображения представлены выше. На них показано расположение центра описанной окружности для остроугольного и тупоугольного треугольников.

Как вы думаете, во всякий ли треугольник можно вписать окружность?

Да, в любой треугольник можно вписать окружность, причём только одну. Центр этой окружности, называемый инцентром, является точкой пересечения биссектрис углов треугольника. Биссектриса — это луч, выходящий из вершины угла и делящий его пополам. Три биссектрисы треугольника всегда пересекаются в одной точке внутри треугольника. Эта точка равноудалена от всех трёх сторон треугольника. Расстояние от инцентра до любой из сторон является радиусом вписанной окружности. Формула для радиуса вписанной окружности $r$ через площадь $S$ и полупериметр $p = (a+b+c)/2$ выглядит так: $r = \frac{S}{p}$.

Ответ: Да, во всякий треугольник можно вписать окружность.

Изобразите окружности, вписанные в остроугольный и тупоугольный треугольники.

Центр вписанной окружности (инцентр) всегда находится внутри треугольника, независимо от его вида (остроугольный, прямоугольный или тупоугольный).

Окружность, вписанная в остроугольный треугольник (центр I - внутри):

ICAB

Окружность, вписанная в тупоугольный треугольник (центр I - внутри):

ICAB

Ответ: Изображения представлены выше. Они показывают, что центр вписанной окружности всегда находится внутри треугольника.

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Мы подготовили для вас ответ c подробным объяснением домашего задания по геометрии за 7 класс, для упражнения Задания расположенного на странице 124 к учебнику 2017 года издания для учащихся школ и гимназий.

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