Номер 553, страница 141 - гдз по геометрии 10-11 класс учебник Атанасян, Бутузов

Геометрия, 10-11 класс Учебник, авторы: Атанасян Левон Сергеевич, Бутузов Валентин Фёдорович, Кадомцев Сергей Борисович, Позняк Эдуард Генрихович, Киселёва Людмила Сергеевна, издательство Просвещение, Москва, 2019, коричневого цвета

Авторы: Атанасян Л. С., Бутузов В. Ф., Кадомцев С. Б., Позняк Э. Г., Киселёва Л. С.

Тип: Учебник

Издательство: Просвещение

Год издания: 2019 - 2026

Уровень обучения: базовый и углублённый

Цвет обложки: коричневый с ромбами

ISBN: 978-5-09-103606-0 (2023)

Допущено Министерством просвещения Российской Федерации

Математика: алгебра и начала математического анализа, геометрия

Глава 5. Объёмы тел. Параграф 4. Объём шара и площадь сферы, дополнительные задачи - номер 553, страница 141.

App\Models\Task {#1030 // resources/views/models/task/default.blade.php
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                            "created_at" => "2026-04-10 13:58:26"
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                            "field_name" => "Людмила"
                            "field_patronymic" => "Сергеевна"
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                          ]
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                          ]
                        }
                      ]
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                    }
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                      #items: []
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                    }
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                        0 => App\Models\Term {#1065
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
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                          #attributes: array:10 [
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                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
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                            "field_cases" => array:6 [ …6]
                            "field_plural_form" => null
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                          ]
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                      ]
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                        0 => App\Models\Term {#1067
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                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
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                            "field_translit" => "rossiya"
                          ]
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                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
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                    "field_city" => Illuminate\Database\Eloquent\Collection {#1068
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                        0 => App\Models\Term {#1069
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
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                          #attributes: array:6 [
                            "id" => 15
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "Москва"
                            "field_cases" => array:6 [ …6]
                            "field_translit" => "moskva"
                          ]
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                            "updated_at" => null
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                      ]
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                    }
                    "field_umk" => Illuminate\Database\Eloquent\Collection {#1071
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1072
                      #items: array:1 [
                        0 => App\Models\Term {#1073
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
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                            "id" => 41
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
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                            "field_cases" => array:6 [ …6]
                            "field_translit" => "bazovyy i uglublennyy"
                          ]
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                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
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                            "field_translit" => "bazovyy i uglublennyy"
                          ]
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                          ]
                        }
                      ]
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                    }
                    "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1074
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                        0 => App\Models\Term {#1075
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
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                          #attributes: array:10 [
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                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "ФГОС (старый)"
                            "field_cases" => array:6 [ …6]
                            "field_color" => null
                            "field_end_year" => "2022"
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                          ]
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                            "field_color" => null
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                          ]
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                      ]
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                    "field_publication_number" => "11"
                    "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1076
                      #items: array:1 [
                        0 => App\Models\Term {#1077
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
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                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "стереотипное"
                            "field_cases" => array:6 [ …6]
                            "field_translit" => "stereotipnoe"
                          ]
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                            "id" => 33
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "стереотипное"
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                          ]
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                      ]
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                    }
                    "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1078
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_under_the_edition_degree" => null
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                    "field_part" => ""
                    "field_part_writing" => ""
                    "field_second_foreign_language" => null
                    "field_for_whom" => "Учебник для общеобразовательных организаций"
                    "field_allowed" => "Допущено Министерством просвещения Российской Федерации"
                    "field_reserve_field" => "Математика: алгебра и начала математического анализа, геометрия"
                    "field_link_to_source" => null
                    "field_tasks_count" => "1147"
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                    "field_cover" => array:1 [
                      0 => "/media/geometrija_10/atanasjan-u23/covers/cover1.webp?ts=1739363242"
                    ]
                    "field_cover_alts" => array:1 [
                      0 => ""
                    ]
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                        "alt" => ""
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                      ]
                    ]
                    "field_popular_book" => null
                    "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1079
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_new_book" => Illuminate\Database\Eloquent\Collection {#1080
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_old_book" => Illuminate\Database\Eloquent\Collection {#1081
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_url" => "/10-klass/geometrija/atanasjan-uchebnik"
                    "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1082
                      #items: array:1 [
                        0 => App\Models\Term {#1083
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
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                          #attributes: array:6 [
                            "id" => 51
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "коричневый"
                            "field_cases" => array:6 [ …6]
                            "field_translit" => "korichnevyy"
                          ]
                          #original: array:6 [
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                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "коричневый"
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                            "field_translit" => "korichnevyy"
                          ]
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                      ]
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                    ]
                  ]
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                    "field_subject" => Illuminate\Database\Eloquent\Collection {#1051}
                    "field_class" => Illuminate\Database\Eloquent\Collection {#1052}
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                    "field_author" => Illuminate\Database\Eloquent\Collection {#1057}
                    "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1063}
                    "field_book_type" => Illuminate\Database\Eloquent\Collection {#1064}
                    "field_country" => Illuminate\Database\Eloquent\Collection {#1066}
                    "field_city" => Illuminate\Database\Eloquent\Collection {#1068}
                    "field_series" => Illuminate\Database\Eloquent\Collection {#1070}
                    "field_umk" => Illuminate\Database\Eloquent\Collection {#1071}
                    "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1072}
                    "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1074}
                    "field_publication_number" => "11"
                    "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1076}
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                    "field_part" => ""
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                    "field_second_foreign_language" => null
                    "field_for_whom" => "Учебник для общеобразовательных организаций"
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                    "field_link_to_source" => null
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                      0 => "/media/geometrija_10/atanasjan-u23/covers/cover1.webp?ts=1739363242"
                    ]
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                      ]
                    ]
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                    "field_new_book" => Illuminate\Database\Eloquent\Collection {#1080}
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                    "field_url" => "/10-klass/geometrija/atanasjan-uchebnik"
                    "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1082}
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                    "breadcrumbs" => array:3 [
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                  ]
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                    0 => "*"
                  ]
                }
              ]
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            }
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1084
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              #escapeWhenCastingToString: false
            }
          ]
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            "updated_at" => null
            "field_display_title" => "Объёмы тел"
            "field_branch_order" => "5"
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1050}
            "field_page_start" => "116"
            "field_branch_display" => "0"
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            "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
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            "field_branch_cover" => []
            "field_branch_covers" => []
            "book" => Illuminate\Database\Eloquent\Collection {#1086}
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1084}
          ]
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            0 => "*"
          ]
        }
      ]
      #escapeWhenCastingToString: false
    }
    "parent_branches" => Illuminate\Database\Eloquent\Collection {#1121
      #items: array:2 [
        0 => App\Models\Branch {#1129
          #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" => 744392
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => "Объёмы тел"
            "field_branch_order" => "5"
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1130
              #items: array:1 [
                0 => App\Models\Term {#1047}
              ]
              #escapeWhenCastingToString: false
            }
            "field_page_start" => "116"
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            "field_display_branch_in_title" => "1"
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            "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 {#1131
              #items: array:1 [
                0 => App\Models\Book {#1049}
              ]
              #escapeWhenCastingToString: false
            }
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1132
              #items: []
              #escapeWhenCastingToString: false
            }
          ]
          #original: array:24 [
            "id" => 744392
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => "Объёмы тел"
            "field_branch_order" => "5"
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1130}
            "field_page_start" => "116"
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            "field_branch_covers" => []
            "book" => Illuminate\Database\Eloquent\Collection {#1131}
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            0 => "*"
          ]
        }
        1 => App\Models\Branch {#1133
          #connection: "mysql"
          #table: "branches"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
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          #attributes: array:24 [
            "id" => 744398
            "created_at" => "2026-04-10 13:58:26"
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            "field_branch_order" => "4"
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              #items: array:1 [
                0 => App\Models\Term {#1134
                  #connection: "mysql"
                  #table: "terms"
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                  #keyType: "int"
                  +incrementing: false
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                  #attributes: array:7 [
                    "id" => 32
                    "created_at" => "2026-04-10 13:58:26"
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                    "name" => "Параграф"
                    "field_cases" => array:6 [ …6]
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                    "created_at" => "2026-04-10 13:58:26"
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                    "name" => "Параграф"
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                0 => App\Models\Branch {#1045}
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            0 => "*"
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      ]
      #escapeWhenCastingToString: false
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    "content" => Illuminate\Database\Eloquent\Collection {#1038
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        0 => App\Models\Element {#1111
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            "id" => 939217
            "created_at" => "2026-04-10 13:58:26"
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                  #connection: "mysql"
                  #table: "editions"
                  #primaryKey: "id"
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                  #escapeWhenCastingToString: false
                  #attributes: array:21 [
                    "id" => 2315
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "title" => "Условие"
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                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1106 …2}
                    "field_content_type" => "free"
                    "field_content_mode" => "text, image"
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                    "field_content_text_checked" => null
                    "field_page_content_text_checked" => "0"
                    "field_solution_author" => "Автор"
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                    "updated_at" => null
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                    "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1104 …2}
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                  ]
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              ]
              #escapeWhenCastingToString: false
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            "task" => array:2 [
              "refs" => "744968"
              "type" => "task"
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            "text" => "<p> <b>553.</b> В шар вписана пирамида, основанием которой является прямоугольник с диагональю 10 см. Каждое боковое ребро пирамиды составляет с основанием угол β. Найдите площадь поверхности и объём шара. </p>"
            "img" => array:1 [
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                "name" => "553-1.jpg"
                "alt" => null
                "width" => "1561"
                "height" => 251
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          ]
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            "id" => 939217
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "edition" => Illuminate\Database\Eloquent\Collection {#1100}
            "task" => array:2 [
              "refs" => "744968"
              "type" => "task"
            ]
            "text" => "<p> <b>553.</b> В шар вписана пирамида, основанием которой является прямоугольник с диагональю 10 см. Каждое боковое ребро пирамиды составляет с основанием угол β. Найдите площадь поверхности и объём шара. </p>"
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                "alt" => null
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                "path" => "/media/geometrija_10/atanasjan-u23/0-00/553-1.webp?ts=1739436735"
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          ]
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        1 => App\Models\Element {#1096
          #connection: "mysql"
          #table: "elements"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
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            "created_at" => "2026-04-10 13:58:26"
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                0 => App\Models\Edition {#1095
                  #connection: "mysql"
                  #table: "editions"
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                  #keyType: "int"
                  +incrementing: false
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                  #attributes: array:21 [
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                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "title" => "Решение 2"
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                    "field_edition_type" => "solution"
                    "field_root_dir" => "2-"
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                    "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1085 …2}
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                    "updated_at" => null
                    "title" => "Решение 2"
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                    0 => "*"
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                "width" => "694"
                "height" => 6099
                "path" => "/media/geometrija_10/atanasjan-u23/2-00/553-1.webp?ts=1739441422"
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          ]
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        2 => App\Models\Element {#1102
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                  #connection: "mysql"
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            "created_at" => "2026-04-10 13:58:26"
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                    "title" => "Решение 6"
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                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1034 …2}
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            "task" => array:2 [
              "refs" => "744968"
              "type" => "task"
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            "text" => "<p>Для нахождения площади поверхности и объёма шара необходимо определить его радиус $R$.</p><p>Пусть $SABCD$ — данная пирамида, вписанная в шар, где $ABCD$ — прямоугольник в основании. Пусть $S$ — вершина пирамиды. Так как каждое боковое ребро пирамиды составляет с основанием один и тот же угол $\beta$, то высота пирамиды $SO$ проецируется в центр окружности, описанной около основания. Центром окружности, описанной около прямоугольника, является точка пересечения его диагоналей $O$.</p><p>Радиус $r$ окружности, описанной около прямоугольника-основания, равен половине его диагонали $d$. По условию $d=10$ см, следовательно:</p><p>$r = \frac{d}{2} = \frac{10}{2} = 5$ см.</p><p>Этот радиус $r$ является проекцией бокового ребра на плоскость основания. Например, для бокового ребра $SA$, его проекцией будет отрезок $OA$, и $OA=r=5$ см. Угол между боковым ребром $SA$ и основанием — это угол $\angle SAO = \beta$.</p><p>Рассмотрим прямоугольный треугольник $\triangle SAO$. Из него мы можем найти длину бокового ребра $l = SA$:</p><p>$\cos\beta = \frac{OA}{SA} \implies SA = \frac{OA}{\cos\beta} = \frac{5}{\cos\beta}$ см.</p><p>Все вершины пирамиды лежат на поверхности шара. Рассмотрим сечение шара плоскостью, проходящей через вершину $S$ и диагональ основания $AC$. Это сечение представляет собой окружность, описанную около равнобедренного треугольника $\triangle SAC$. Эта окружность является большим кругом шара, и её радиус равен радиусу шара $R$.</p><p>Найдем радиус $R$ описанной окружности треугольника $\triangle SAC$. Стороны этого треугольника: $AC = 10$ см, $SA = SC = l = \frac{5}{\cos\beta}$ см.</p><p>Для нахождения радиуса описанной окружности $R$ воспользуемся формулой $R = \frac{abc}{4K}$, где $a, b, c$ — стороны треугольника, а $K$ — его площадь.</p><p>Найдем высоту треугольника $\triangle SAC$, проведенную из вершины $S$, которая является высотой пирамиды $SO$. Из прямоугольного треугольника $\triangle SAO$:</p><p>$SO = OA \cdot \tan\beta = 5 \tan\beta$ см.</p><p>Площадь треугольника $\triangle SAC$:</p><p>$K = \frac{1}{2} \cdot AC \cdot SO = \frac{1}{2} \cdot 10 \cdot 5 \tan\beta = 25 \tan\beta$ см?.</p><p>Теперь вычислим радиус шара $R$:</p><p>$R = \frac{SA \cdot SC \cdot AC}{4K} = \frac{\frac{5}{\cos\beta} \cdot \frac{5}{\cos\beta} \cdot 10}{4 \cdot 25 \tan\beta} = \frac{\frac{250}{\cos^2\beta}}{100 \tan\beta} = \frac{250}{100 \cos^2\beta \frac{\sin\beta}{\cos\beta}} = \frac{2.5}{\sin\beta\cos\beta}$</p><p>Используя формулу синуса двойного угла $\sin(2\beta) = 2\sin\beta\cos\beta$, получим:</p><p>$R = \frac{2.5}{\frac{1}{2}\sin(2\beta)} = \frac{5}{\sin(2\beta)}$ см.</p><p>Теперь, зная радиус шара, можем найти его площадь поверхности и объём.</p><p><strong>Площадь поверхности шара</strong></p><p>Площадь поверхности шара вычисляется по формуле $S = 4\pi R^2$.</p><p>$S = 4\pi \left(\frac{5}{\sin(2\beta)}\right)^2 = 4\pi \frac{25}{\sin^2(2\beta)} = \frac{100\pi}{\sin^2(2\beta)}$ см?.</p><p>Ответ: $S = \frac{100\pi}{\sin^2(2\beta)}$ см?.</p><p><strong>Объём шара</strong></p><p>Объём шара вычисляется по формуле $V = \frac{4}{3}\pi R^3$.</p><p>$V = \frac{4}{3}\pi \left(\frac{5}{\sin(2\beta)}\right)^3 = \frac{4}{3}\pi \frac{125}{\sin^3(2\beta)} = \frac{500\pi}{3\sin^3(2\beta)}$ см?.</p><p>Ответ: $V = \frac{500\pi}{3\sin^3(2\beta)}$ см?.</p>"
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            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "edition" => Illuminate\Database\Eloquent\Collection {#1122}
            "task" => array:2 [
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              "type" => "task"
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            "text" => "<p>Для нахождения площади поверхности и объёма шара необходимо определить его радиус $R$.</p><p>Пусть $SABCD$ — данная пирамида, вписанная в шар, где $ABCD$ — прямоугольник в основании. Пусть $S$ — вершина пирамиды. Так как каждое боковое ребро пирамиды составляет с основанием один и тот же угол $\beta$, то высота пирамиды $SO$ проецируется в центр окружности, описанной около основания. Центром окружности, описанной около прямоугольника, является точка пересечения его диагоналей $O$.</p><p>Радиус $r$ окружности, описанной около прямоугольника-основания, равен половине его диагонали $d$. По условию $d=10$ см, следовательно:</p><p>$r = \frac{d}{2} = \frac{10}{2} = 5$ см.</p><p>Этот радиус $r$ является проекцией бокового ребра на плоскость основания. Например, для бокового ребра $SA$, его проекцией будет отрезок $OA$, и $OA=r=5$ см. Угол между боковым ребром $SA$ и основанием — это угол $\angle SAO = \beta$.</p><p>Рассмотрим прямоугольный треугольник $\triangle SAO$. Из него мы можем найти длину бокового ребра $l = SA$:</p><p>$\cos\beta = \frac{OA}{SA} \implies SA = \frac{OA}{\cos\beta} = \frac{5}{\cos\beta}$ см.</p><p>Все вершины пирамиды лежат на поверхности шара. Рассмотрим сечение шара плоскостью, проходящей через вершину $S$ и диагональ основания $AC$. Это сечение представляет собой окружность, описанную около равнобедренного треугольника $\triangle SAC$. Эта окружность является большим кругом шара, и её радиус равен радиусу шара $R$.</p><p>Найдем радиус $R$ описанной окружности треугольника $\triangle SAC$. Стороны этого треугольника: $AC = 10$ см, $SA = SC = l = \frac{5}{\cos\beta}$ см.</p><p>Для нахождения радиуса описанной окружности $R$ воспользуемся формулой $R = \frac{abc}{4K}$, где $a, b, c$ — стороны треугольника, а $K$ — его площадь.</p><p>Найдем высоту треугольника $\triangle SAC$, проведенную из вершины $S$, которая является высотой пирамиды $SO$. Из прямоугольного треугольника $\triangle SAO$:</p><p>$SO = OA \cdot \tan\beta = 5 \tan\beta$ см.</p><p>Площадь треугольника $\triangle SAC$:</p><p>$K = \frac{1}{2} \cdot AC \cdot SO = \frac{1}{2} \cdot 10 \cdot 5 \tan\beta = 25 \tan\beta$ см?.</p><p>Теперь вычислим радиус шара $R$:</p><p>$R = \frac{SA \cdot SC \cdot AC}{4K} = \frac{\frac{5}{\cos\beta} \cdot \frac{5}{\cos\beta} \cdot 10}{4 \cdot 25 \tan\beta} = \frac{\frac{250}{\cos^2\beta}}{100 \tan\beta} = \frac{250}{100 \cos^2\beta \frac{\sin\beta}{\cos\beta}} = \frac{2.5}{\sin\beta\cos\beta}$</p><p>Используя формулу синуса двойного угла $\sin(2\beta) = 2\sin\beta\cos\beta$, получим:</p><p>$R = \frac{2.5}{\frac{1}{2}\sin(2\beta)} = \frac{5}{\sin(2\beta)}$ см.</p><p>Теперь, зная радиус шара, можем найти его площадь поверхности и объём.</p><p><strong>Площадь поверхности шара</strong></p><p>Площадь поверхности шара вычисляется по формуле $S = 4\pi R^2$.</p><p>$S = 4\pi \left(\frac{5}{\sin(2\beta)}\right)^2 = 4\pi \frac{25}{\sin^2(2\beta)} = \frac{100\pi}{\sin^2(2\beta)}$ см?.</p><p>Ответ: $S = \frac{100\pi}{\sin^2(2\beta)}$ см?.</p><p><strong>Объём шара</strong></p><p>Объём шара вычисляется по формуле $V = \frac{4}{3}\pi R^3$.</p><p>$V = \frac{4}{3}\pi \left(\frac{5}{\sin(2\beta)}\right)^3 = \frac{4}{3}\pi \frac{125}{\sin^3(2\beta)} = \frac{500\pi}{3\sin^3(2\beta)}$ см?.</p><p>Ответ: $V = \frac{500\pi}{3\sin^3(2\beta)}$ см?.</p>"
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    "book" => Illuminate\Database\Eloquent\Collection {#1112
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            "content" => Illuminate\Database\Eloquent\Collection {#1144
              #items: array:1 [
                0 => App\Models\Element {#1143
                  #connection: "mysql"
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                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "edition" => Illuminate\Database\Eloquent\Collection {#1145 …2}
                    "book_page" => array:2 [ …2]
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                    "edition" => Illuminate\Database\Eloquent\Collection {#1145 …2}
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                    "book" => Illuminate\Database\Eloquent\Collection {#1261 …2}
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                    "book" => Illuminate\Database\Eloquent\Collection {#1261 …2}
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                }
                1 => App\Models\Task {#1253
                  #connection: "mysql"
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                  #attributes: array:24 [ …24]
                  #original: array:24 [ …24]
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                }
                2 => App\Models\Task {#1257
                  #connection: "mysql"
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                3 => App\Models\Task {#1273
                  #connection: "mysql"
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№553 (с. 141)
Условие. №553 (с. 141)
скриншот условия
Геометрия, 10-11 класс Учебник, авторы: Атанасян Левон Сергеевич, Бутузов Валентин Фёдорович, Кадомцев Сергей Борисович, Позняк Эдуард Генрихович, Киселёва Людмила Сергеевна, издательство Просвещение, Москва, 2019, коричневого цвета, страница 141, номер 553, Условие

553. В шар вписана пирамида, основанием которой является прямоугольник с диагональю 10 см. Каждое боковое ребро пирамиды составляет с основанием угол β. Найдите площадь поверхности и объём шара.

Решение 2. №553 (с. 141)
Геометрия, 10-11 класс Учебник, авторы: Атанасян Левон Сергеевич, Бутузов Валентин Фёдорович, Кадомцев Сергей Борисович, Позняк Эдуард Генрихович, Киселёва Людмила Сергеевна, издательство Просвещение, Москва, 2019, коричневого цвета, страница 141, номер 553, Решение 2
Решение 3. №553 (с. 141)
Геометрия, 10-11 класс Учебник, авторы: Атанасян Левон Сергеевич, Бутузов Валентин Фёдорович, Кадомцев Сергей Борисович, Позняк Эдуард Генрихович, Киселёва Людмила Сергеевна, издательство Просвещение, Москва, 2019, коричневого цвета, страница 141, номер 553, Решение 3
Геометрия, 10-11 класс Учебник, авторы: Атанасян Левон Сергеевич, Бутузов Валентин Фёдорович, Кадомцев Сергей Борисович, Позняк Эдуард Генрихович, Киселёва Людмила Сергеевна, издательство Просвещение, Москва, 2019, коричневого цвета, страница 141, номер 553, Решение 3 (продолжение 2)
Решение 6. №553 (с. 141)

Для нахождения площади поверхности и объёма шара необходимо определить его радиус $R$.

Пусть $SABCD$ — данная пирамида, вписанная в шар, где $ABCD$ — прямоугольник в основании. Пусть $S$ — вершина пирамиды. Так как каждое боковое ребро пирамиды составляет с основанием один и тот же угол $\beta$, то высота пирамиды $SO$ проецируется в центр окружности, описанной около основания. Центром окружности, описанной около прямоугольника, является точка пересечения его диагоналей $O$.

Радиус $r$ окружности, описанной около прямоугольника-основания, равен половине его диагонали $d$. По условию $d=10$ см, следовательно:

$r = \frac{d}{2} = \frac{10}{2} = 5$ см.

Этот радиус $r$ является проекцией бокового ребра на плоскость основания. Например, для бокового ребра $SA$, его проекцией будет отрезок $OA$, и $OA=r=5$ см. Угол между боковым ребром $SA$ и основанием — это угол $\angle SAO = \beta$.

Рассмотрим прямоугольный треугольник $\triangle SAO$. Из него мы можем найти длину бокового ребра $l = SA$:

$\cos\beta = \frac{OA}{SA} \implies SA = \frac{OA}{\cos\beta} = \frac{5}{\cos\beta}$ см.

Все вершины пирамиды лежат на поверхности шара. Рассмотрим сечение шара плоскостью, проходящей через вершину $S$ и диагональ основания $AC$. Это сечение представляет собой окружность, описанную около равнобедренного треугольника $\triangle SAC$. Эта окружность является большим кругом шара, и её радиус равен радиусу шара $R$.

Найдем радиус $R$ описанной окружности треугольника $\triangle SAC$. Стороны этого треугольника: $AC = 10$ см, $SA = SC = l = \frac{5}{\cos\beta}$ см.

Для нахождения радиуса описанной окружности $R$ воспользуемся формулой $R = \frac{abc}{4K}$, где $a, b, c$ — стороны треугольника, а $K$ — его площадь.

Найдем высоту треугольника $\triangle SAC$, проведенную из вершины $S$, которая является высотой пирамиды $SO$. Из прямоугольного треугольника $\triangle SAO$:

$SO = OA \cdot \tan\beta = 5 \tan\beta$ см.

Площадь треугольника $\triangle SAC$:

$K = \frac{1}{2} \cdot AC \cdot SO = \frac{1}{2} \cdot 10 \cdot 5 \tan\beta = 25 \tan\beta$ см?.

Теперь вычислим радиус шара $R$:

$R = \frac{SA \cdot SC \cdot AC}{4K} = \frac{\frac{5}{\cos\beta} \cdot \frac{5}{\cos\beta} \cdot 10}{4 \cdot 25 \tan\beta} = \frac{\frac{250}{\cos^2\beta}}{100 \tan\beta} = \frac{250}{100 \cos^2\beta \frac{\sin\beta}{\cos\beta}} = \frac{2.5}{\sin\beta\cos\beta}$

Используя формулу синуса двойного угла $\sin(2\beta) = 2\sin\beta\cos\beta$, получим:

$R = \frac{2.5}{\frac{1}{2}\sin(2\beta)} = \frac{5}{\sin(2\beta)}$ см.

Теперь, зная радиус шара, можем найти его площадь поверхности и объём.

Площадь поверхности шара

Площадь поверхности шара вычисляется по формуле $S = 4\pi R^2$.

$S = 4\pi \left(\frac{5}{\sin(2\beta)}\right)^2 = 4\pi \frac{25}{\sin^2(2\beta)} = \frac{100\pi}{\sin^2(2\beta)}$ см?.

Ответ: $S = \frac{100\pi}{\sin^2(2\beta)}$ см?.

Объём шара

Объём шара вычисляется по формуле $V = \frac{4}{3}\pi R^3$.

$V = \frac{4}{3}\pi \left(\frac{5}{\sin(2\beta)}\right)^3 = \frac{4}{3}\pi \frac{125}{\sin^3(2\beta)} = \frac{500\pi}{3\sin^3(2\beta)}$ см?.

Ответ: $V = \frac{500\pi}{3\sin^3(2\beta)}$ см?.

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