Номер 446, страница 121 - 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 1. Объём прямоугольного параллелепипеда - номер 446, страница 121.

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                          #hidden: []
                          #visible: []
                          #fillable: []
                          #guarded: array:1 [
                            0 => "*"
                          ]
                        }
                        1 => App\Models\Term {#1136
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
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                          +wasRecentlyCreated: false
                          #escapeWhenCastingToString: false
                          #attributes: array:6 [
                            "id" => 5460
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "11"
                            "field_cases" => array:6 [ …6]
                            "field_translit" => "odinadcatyj"
                          ]
                          #original: array:6 [
                            "id" => 5460
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "11"
                            "field_cases" => array:6 [ …6]
                            "field_translit" => "odinadcatyj"
                          ]
                          #changes: []
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                            0 => "*"
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                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1137
                      #items: array:1 [
                        0 => App\Models\Term {#1138
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
                          #with: []
                          #withCount: []
                          +preventsLazyLoading: false
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                          +exists: true
                          +wasRecentlyCreated: false
                          #escapeWhenCastingToString: false
                          #attributes: array:6 [
                            "id" => 5153
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "Просвещение"
                            "field_cases" => null
                             …1
                          ]
                          #original: array:6 [ …6]
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                          #casts: []
                          #classCastCache: []
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                          #dateFormat: null
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                          +timestamps: true
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                          #hidden: []
                          #visible: []
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                          #guarded: array:1 [ …1]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_author" => Illuminate\Database\Eloquent\Collection {#1139
                      #items: array:5 [
                        0 => App\Models\Term {#1140
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
                          #with: []
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                          #attributes: array:12 [ …12]
                          #original: array:12 [ …12]
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                          #dateFormat: null
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                          +timestamps: true
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                          #hidden: []
                          #visible: []
                          #fillable: []
                          #guarded: array:1 [ …1]
                        }
                        1 => App\Models\Term {#1141
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
                          #with: []
                          #withCount: []
                          +preventsLazyLoading: false
                          #perPage: 15
                          +exists: true
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                          #escapeWhenCastingToString: false
                          #attributes: array:12 [ …12]
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                          #attributeCastCache: []
                          #dateFormat: null
                          #appends: []
                          #dispatchesEvents: []
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                          #relations: []
                          #touches: []
                          +timestamps: true
                          +usesUniqueIds: false
                          #hidden: []
                          #visible: []
                          #fillable: []
                          #guarded: array:1 [ …1]
                        }
                        2 => App\Models\Term {#1142
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
                          #with: []
                          #withCount: []
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                          +exists: true
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                          #escapeWhenCastingToString: false
                          #attributes: array:12 [ …12]
                          #original: array:12 [ …12]
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                          #dateFormat: null
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                          #relations: []
                          #touches: []
                          +timestamps: true
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                          #hidden: []
                          #visible: []
                          #fillable: []
                          #guarded: array:1 [ …1]
                        }
                        3 => App\Models\Term {#1143
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
                          #with: []
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                          #attributes: array:12 [ …12]
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                          +timestamps: true
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                          #visible: []
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                          #guarded: array:1 [ …1]
                        }
                        4 => App\Models\Term {#1144
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
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                          #with: []
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                          #hidden: []
                          #visible: []
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                          #guarded: array:1 [ …1]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1145
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_book_type" => Illuminate\Database\Eloquent\Collection {#1146
                      #items: array:1 [
                        0 => App\Models\Term {#1147
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
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                          #withCount: []
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                          #attributes: array:10 [ …10]
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                          #visible: []
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                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_country" => Illuminate\Database\Eloquent\Collection {#1148
                      #items: array:1 [
                        0 => App\Models\Term {#1149
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
                          #with: []
                          #withCount: []
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                          #attributes: array:6 [ …6]
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                          #touches: []
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                          #visible: []
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                          #guarded: array:1 [ …1]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_city" => Illuminate\Database\Eloquent\Collection {#1150
                      #items: array:1 [
                        0 => App\Models\Term {#1151
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
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                          #with: []
                          #withCount: []
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                          #attributes: array:6 [ …6]
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                          #hidden: []
                          #visible: []
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                          #guarded: array:1 [ …1]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_series" => Illuminate\Database\Eloquent\Collection {#1152
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_umk" => Illuminate\Database\Eloquent\Collection {#1153
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1154
                      #items: array:1 [
                        0 => App\Models\Term {#1155
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
                          #with: []
                          #withCount: []
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                          #perPage: 15
                          +exists: true
                          +wasRecentlyCreated: false
                          #escapeWhenCastingToString: false
                          #attributes: array:6 [ …6]
                          #original: array:6 [ …6]
                          #changes: []
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                          #dateFormat: null
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                          #touches: []
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                          #hidden: []
                          #visible: []
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                          #guarded: array:1 [ …1]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1156
                      #items: array:1 [
                        0 => App\Models\Term {#1157
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
                          #with: []
                          #withCount: []
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                          #perPage: 15
                          +exists: true
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                          #escapeWhenCastingToString: false
                          #attributes: array:10 [ …10]
                          #original: array:10 [ …10]
                          #changes: []
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                          #attributeCastCache: []
                          #dateFormat: null
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                          #touches: []
                          +timestamps: true
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                          #hidden: []
                          #visible: []
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                          #guarded: array:1 [ …1]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_publication_number" => "11"
                    "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1158
                      #items: array:1 [
                        0 => App\Models\Term {#1159
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
                          #with: []
                          #withCount: []
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                          #attributes: array:6 [ …6]
                          #original: array:6 [ …6]
                          #changes: []
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                          #dateFormat: null
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                          #touches: []
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                          #guarded: array:1 [ …1]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1160
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_under_the_edition_degree" => null
                    "field_cover_description" => "с ромбами"
                    "field_publication_year" => "2019"
                    "field_publication_year_until" => null
                    "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"
                    "field_priority" => "12"
                    "field_default_folder" => "/geometrija_10/atanasjan-u23/"
                    "field_isbn" => "978-5-09-103606-0 (2023)"
                    "field_cover" => array:1 [
                      0 => "/media/geometrija_10/atanasjan-u23/covers/cover1.webp?ts=1739363242"
                    ]
                    "field_cover_alts" => array:1 [
                      0 => ""
                    ]
                    "field_covers" => array:1 [
                      0 => array:4 [
                        "path" => "/media/geometrija_10/atanasjan-u23/covers/cover1.webp?ts=1739363242"
                        "alt" => ""
                        "width" => "1200"
                        "height" => "1661"
                      ]
                    ]
                    "field_popular_book" => null
                    "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1161
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_new_book" => Illuminate\Database\Eloquent\Collection {#1162
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_old_book" => Illuminate\Database\Eloquent\Collection {#1163
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_url" => "/10-klass/geometrija/atanasjan-uchebnik"
                    "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1164
                      #items: array:1 [
                        0 => App\Models\Term {#1165
                          #connection: "mysql"
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                          #primaryKey: "id"
                          #keyType: "int"
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                          #with: []
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                          #attributes: array:6 [ …6]
                          #original: array:6 [ …6]
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                      ]
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                    "field_metatags_title" => null
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                    "breadcrumbs" => array:3 [
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                    ]
                  ]
                  #original: array:50 [
                    "id" => 36
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "field_tree_default_status" => "tasks"
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                    "field_subject" => Illuminate\Database\Eloquent\Collection {#1133}
                    "field_class" => Illuminate\Database\Eloquent\Collection {#1134}
                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1137}
                    "field_author" => Illuminate\Database\Eloquent\Collection {#1139}
                    "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1145}
                    "field_book_type" => Illuminate\Database\Eloquent\Collection {#1146}
                    "field_country" => Illuminate\Database\Eloquent\Collection {#1148}
                    "field_city" => Illuminate\Database\Eloquent\Collection {#1150}
                    "field_series" => Illuminate\Database\Eloquent\Collection {#1152}
                    "field_umk" => Illuminate\Database\Eloquent\Collection {#1153}
                    "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1154}
                    "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1156}
                    "field_publication_number" => "11"
                    "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1158}
                    "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1160}
                    "field_under_the_edition_degree" => null
                    "field_cover_description" => "с ромбами"
                    "field_publication_year" => "2019"
                    "field_publication_year_until" => null
                    "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_default_folder" => "/geometrija_10/atanasjan-u23/"
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                    "field_cover" => array:1 [
                      0 => "/media/geometrija_10/atanasjan-u23/covers/cover1.webp?ts=1739363242"
                    ]
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                      0 => ""
                    ]
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                      0 => array:4 [
                        "path" => "/media/geometrija_10/atanasjan-u23/covers/cover1.webp?ts=1739363242"
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                        "width" => "1200"
                        "height" => "1661"
                      ]
                    ]
                    "field_popular_book" => null
                    "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1161}
                    "field_new_book" => Illuminate\Database\Eloquent\Collection {#1162}
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                    "field_url" => "/10-klass/geometrija/atanasjan-uchebnik"
                    "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1164}
                    "field_metatags_title" => null
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                    "breadcrumbs" => array:3 [
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                  ]
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                  #visible: []
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                    0 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1166
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            }
          ]
          #original: array:24 [
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            "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 {#1132}
            "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 {#1168}
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1166}
          ]
          #changes: []
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          #dateFormat: null
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            0 => "*"
          ]
        }
        1 => App\Models\Branch {#1167
          #connection: "mysql"
          #table: "branches"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
          +preventsLazyLoading: false
          #perPage: 15
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          #escapeWhenCastingToString: false
          #attributes: array:24 [
            "id" => 744393
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => "Объём прямоугольного параллелепипеда"
            "field_branch_order" => "1"
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1172
              #items: array:1 [
                0 => App\Models\Term {#1169
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
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                  #escapeWhenCastingToString: false
                  #attributes: array:7 [
                    "id" => 32
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "Параграф"
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                    "field_page_check_not_needed" => null
                    "field_short_name" => "§"
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                    "id" => 32
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "Параграф"
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                    "field_page_check_not_needed" => null
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                    0 => "*"
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            "field_branch_cover" => []
            "field_branch_covers" => []
            "book" => Illuminate\Database\Eloquent\Collection {#1171
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                0 => App\Models\Book {#1131}
              ]
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            }
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1170
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                0 => App\Models\Branch {#1034}
              ]
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            }
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            "id" => 744393
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            "field_branch_order" => "1"
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1172}
            "field_page_start" => "116"
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            "field_h1" => null
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            "field_branch_cover" => []
            "field_branch_covers" => []
            "book" => Illuminate\Database\Eloquent\Collection {#1171}
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1170}
          ]
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            0 => "*"
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      ]
      #escapeWhenCastingToString: false
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    "content" => Illuminate\Database\Eloquent\Collection {#1117
      #items: array:5 [
        0 => App\Models\Element {#1107
          #connection: "mysql"
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            "id" => 939095
            "created_at" => "2026-04-10 13:58:26"
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                0 => App\Models\Edition {#1108
                  #connection: "mysql"
                  #table: "editions"
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                  #keyType: "int"
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                  #perPage: 15
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                  #escapeWhenCastingToString: false
                  #attributes: array:21 [
                    "id" => 2315
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "title" => "Условие"
                    "field_order" => "1"
                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1106 …2}
                    "field_content_type" => "free"
                    "field_content_mode" => "text, image"
                    "field_page_content_mode" => "image"
                    "field_content_text_checked" => null
                    "field_page_content_text_checked" => "0"
                    "field_solution_author" => "Автор"
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                    "field_root_dir" => "0-"
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                  ]
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                    "id" => 2315
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                    "title" => "Условие"
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                    "field_comment" => null
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                  ]
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                    0 => "*"
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              ]
              #escapeWhenCastingToString: false
            }
            "task" => array:2 [
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              "type" => "task"
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            "text" => "<p> <b>446.</b> Диагональ прямоугольного параллелепипеда равна 18 см и составляет угол в 30° с плоскостью боковой грани и угол в 45° с боковым ребром. Найдите объём параллелепипеда. </p>"
            "img" => array:1 [
              0 => array:5 [
                "name" => "446-1.jpg"
                "alt" => null
                "width" => "1579"
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                "path" => "/media/geometrija_10/atanasjan-u23/0-00/446-1.webp?ts=1739436639"
              ]
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          ]
          #original: array:7 [
            "id" => 939095
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "edition" => Illuminate\Database\Eloquent\Collection {#1100}
            "task" => array:2 [
              "refs" => "744861"
              "type" => "task"
            ]
            "text" => "<p> <b>446.</b> Диагональ прямоугольного параллелепипеда равна 18 см и составляет угол в 30° с плоскостью боковой грани и угол в 45° с боковым ребром. Найдите объём параллелепипеда. </p>"
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                "path" => "/media/geometrija_10/atanasjan-u23/0-00/446-1.webp?ts=1739436639"
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          ]
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        1 => App\Models\Element {#1086
          #connection: "mysql"
          #table: "elements"
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          #keyType: "int"
          +incrementing: true
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          #attributes: array:6 [
            "id" => 941818
            "created_at" => "2026-04-10 13:58:26"
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            "edition" => Illuminate\Database\Eloquent\Collection {#1124
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                0 => App\Models\Edition {#1083
                  #connection: "mysql"
                  #table: "editions"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
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                  #attributes: array:21 [
                    "id" => 2317
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
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                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1078 …2}
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                    "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1127 …2}
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                  ]
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                    "updated_at" => null
                    "title" => "Решение 2"
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                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1078 …2}
                    "field_content_type" => "free"
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                    "field_responsible" => Illuminate\Database\Eloquent\Collection {#1119 …2}
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                    "field_similar_book" => Illuminate\Database\Eloquent\Collection {#1118 …2}
                    "field_process_formula" => ""
                    "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1127 …2}
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                  +timestamps: true
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                    0 => "*"
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              ]
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            "task" => array:2 [
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            "img" => array:1 [
              0 => array:5 [
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                "width" => "694"
                "height" => 3709
                "path" => "/media/geometrija_10/atanasjan-u23/2-00/446-1.webp?ts=1739441325"
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          ]
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            "id" => 941818
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "edition" => Illuminate\Database\Eloquent\Collection {#1124}
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              "refs" => "744861"
              "type" => "task"
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                "height" => 3709
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            0 => "*"
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        2 => App\Models\Element {#1094
          #connection: "mysql"
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            "created_at" => "2026-04-10 13:58:26"
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                0 => App\Models\Edition {#1093
                  #connection: "mysql"
                  #table: "editions"
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                    "title" => "Решение 3"
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                    0 => "*"
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            0 => "*"
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        3 => App\Models\Element {#1102
          #connection: "mysql"
          #table: "elements"
          #primaryKey: "id"
          #keyType: "int"
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                0 => App\Models\Edition {#1099
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                  #table: "editions"
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                  #keyType: "int"
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                    "created_at" => "2026-04-10 13:58:26"
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                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1098 …2}
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                    "field_solution_author" => "Неизвестный"
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                    "field_edition_type" => "solution"
                    "field_root_dir" => "4-"
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                    "field_comment" => null
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                    "id" => 2319
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                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1098 …2}
                    "field_content_type" => "free"
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            "edition" => Illuminate\Database\Eloquent\Collection {#1179
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                    "title" => "Решение 6"
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            "text" => "<p>Для решения задачи обозначим измерения прямоугольного параллелепипеда (длину, ширину и высоту) как $a$, $b$ и $c$, а его главную диагональ — как $d$. По условию, $d = 18$ см. Объем параллелепипеда $V$ находится по формуле $V = a \cdot b \cdot c$. Для нахождения объёма необходимо определить все три измерения.</p><p><strong>1. Нахождение первого измерения.</strong>Угол между диагональю и плоскостью боковой грани составляет $30^\circ$. Возьмём диагональ $AC_1$ и боковую грань $ADD_1A_1$. Угол между прямой и плоскостью — это угол между этой прямой и её проекцией на данную плоскость. Проекцией диагонали $AC_1$ на плоскость $ADD_1A_1$ является отрезок $AD_1$, так как $C_1D_1$ — перпендикуляр к этой плоскости. Следовательно, угол $\angle C_1AD_1 = 30^\circ$.Рассмотрим треугольник $\triangle AC_1D_1$. Он является прямоугольным, поскольку ребро $C_1D_1$ перпендикулярно грани $ADD_1A_1$, а значит, и прямой $AD_1$, лежащей в этой грани ($\angle AD_1C_1 = 90^\circ$). Катет $C_1D_1$, лежащий напротив угла в $30^\circ$, является одним из измерений параллелепипеда. Обозначим его как $a$. Из соотношений в прямоугольном треугольнике имеем:$a = C_1D_1 = d \cdot \sin(30^\circ) = 18 \cdot \frac{1}{2} = 9$ см.</p><p><strong>2. Нахождение второго измерения (высоты).</strong>Угол между диагональю $AC_1$ и боковым ребром составляет $45^\circ$. В качестве бокового ребра выберем $AA_1$. Угол между ними — это $\angle A_1AC_1 = 45^\circ$.Рассмотрим треугольник $\triangle AA_1C_1$. Он является прямоугольным, так как боковое ребро $AA_1$ перпендикулярно плоскости основания $A_1B_1C_1D_1$, а значит, и диагонали основания $A_1C_1$ ($\angle AA_1C_1 = 90^\circ$). Высота параллелепипеда $c = AA_1$ является катетом, прилежащим к углу в $45^\circ$. Тогда:$c = AA_1 = d \cdot \cos(45^\circ) = 18 \cdot \frac{\sqrt{2}}{2} = 9\sqrt{2}$ см.</p><p><strong>3. Нахождение третьего измерения.</strong>Квадрат диагонали прямоугольного параллелепипеда равен сумме квадратов трёх его измерений: $d^2 = a^2 + b^2 + c^2$. Мы уже нашли два измерения: $a = 9$ см и $c = 9\sqrt{2}$ см. Найдем третье измерение $b$.Выразим $b^2$ из формулы:$b^2 = d^2 - a^2 - c^2$Подставим известные значения:$b^2 = 18^2 - 9^2 - (9\sqrt{2})^2 = 324 - 81 - (81 \cdot 2) = 324 - 81 - 162 = 324 - 243 = 81$$b = \sqrt{81} = 9$ см.</p><p><strong>4. Вычисление объёма.</strong>Теперь, когда известны все три измерения параллелепипеда ($a=9$ см, $b=9$ см, $c=9\sqrt{2}$ см), мы можем вычислить его объём:$V = a \cdot b \cdot c = 9 \cdot 9 \cdot 9\sqrt{2} = 729\sqrt{2} \text{ см}^3$.</p><p><strong>Ответ:</strong> $729\sqrt{2} \text{ см}^3$.</p>"
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            "task" => array:2 [
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            "text" => "<p>Для решения задачи обозначим измерения прямоугольного параллелепипеда (длину, ширину и высоту) как $a$, $b$ и $c$, а его главную диагональ — как $d$. По условию, $d = 18$ см. Объем параллелепипеда $V$ находится по формуле $V = a \cdot b \cdot c$. Для нахождения объёма необходимо определить все три измерения.</p><p><strong>1. Нахождение первого измерения.</strong>Угол между диагональю и плоскостью боковой грани составляет $30^\circ$. Возьмём диагональ $AC_1$ и боковую грань $ADD_1A_1$. Угол между прямой и плоскостью — это угол между этой прямой и её проекцией на данную плоскость. Проекцией диагонали $AC_1$ на плоскость $ADD_1A_1$ является отрезок $AD_1$, так как $C_1D_1$ — перпендикуляр к этой плоскости. Следовательно, угол $\angle C_1AD_1 = 30^\circ$.Рассмотрим треугольник $\triangle AC_1D_1$. Он является прямоугольным, поскольку ребро $C_1D_1$ перпендикулярно грани $ADD_1A_1$, а значит, и прямой $AD_1$, лежащей в этой грани ($\angle AD_1C_1 = 90^\circ$). Катет $C_1D_1$, лежащий напротив угла в $30^\circ$, является одним из измерений параллелепипеда. Обозначим его как $a$. Из соотношений в прямоугольном треугольнике имеем:$a = C_1D_1 = d \cdot \sin(30^\circ) = 18 \cdot \frac{1}{2} = 9$ см.</p><p><strong>2. Нахождение второго измерения (высоты).</strong>Угол между диагональю $AC_1$ и боковым ребром составляет $45^\circ$. В качестве бокового ребра выберем $AA_1$. Угол между ними — это $\angle A_1AC_1 = 45^\circ$.Рассмотрим треугольник $\triangle AA_1C_1$. Он является прямоугольным, так как боковое ребро $AA_1$ перпендикулярно плоскости основания $A_1B_1C_1D_1$, а значит, и диагонали основания $A_1C_1$ ($\angle AA_1C_1 = 90^\circ$). Высота параллелепипеда $c = AA_1$ является катетом, прилежащим к углу в $45^\circ$. Тогда:$c = AA_1 = d \cdot \cos(45^\circ) = 18 \cdot \frac{\sqrt{2}}{2} = 9\sqrt{2}$ см.</p><p><strong>3. Нахождение третьего измерения.</strong>Квадрат диагонали прямоугольного параллелепипеда равен сумме квадратов трёх его измерений: $d^2 = a^2 + b^2 + c^2$. Мы уже нашли два измерения: $a = 9$ см и $c = 9\sqrt{2}$ см. Найдем третье измерение $b$.Выразим $b^2$ из формулы:$b^2 = d^2 - a^2 - c^2$Подставим известные значения:$b^2 = 18^2 - 9^2 - (9\sqrt{2})^2 = 324 - 81 - (81 \cdot 2) = 324 - 81 - 162 = 324 - 243 = 81$$b = \sqrt{81} = 9$ см.</p><p><strong>4. Вычисление объёма.</strong>Теперь, когда известны все три измерения параллелепипеда ($a=9$ см, $b=9$ см, $c=9\sqrt{2}$ см), мы можем вычислить его объём:$V = a \cdot b \cdot c = 9 \cdot 9 \cdot 9\sqrt{2} = 729\sqrt{2} \text{ см}^3$.</p><p><strong>Ответ:</strong> $729\sqrt{2} \text{ см}^3$.</p>"
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                1 => App\Models\Task {#1339
                  #connection: "mysql"
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                  #connection: "mysql"
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                6 => App\Models\Task {#1418
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№446 (с. 121)
Условие. №446 (с. 121)
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 121, номер 446, Условие

446. Диагональ прямоугольного параллелепипеда равна 18 см и составляет угол в 30° с плоскостью боковой грани и угол в 45° с боковым ребром. Найдите объём параллелепипеда.

Решение 2. №446 (с. 121)
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 121, номер 446, Решение 2
Решение 3. №446 (с. 121)
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 121, номер 446, Решение 3
Решение 4. №446 (с. 121)
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 121, номер 446, Решение 4
Решение 6. №446 (с. 121)

Для решения задачи обозначим измерения прямоугольного параллелепипеда (длину, ширину и высоту) как $a$, $b$ и $c$, а его главную диагональ — как $d$. По условию, $d = 18$ см. Объем параллелепипеда $V$ находится по формуле $V = a \cdot b \cdot c$. Для нахождения объёма необходимо определить все три измерения.

1. Нахождение первого измерения.Угол между диагональю и плоскостью боковой грани составляет $30^\circ$. Возьмём диагональ $AC_1$ и боковую грань $ADD_1A_1$. Угол между прямой и плоскостью — это угол между этой прямой и её проекцией на данную плоскость. Проекцией диагонали $AC_1$ на плоскость $ADD_1A_1$ является отрезок $AD_1$, так как $C_1D_1$ — перпендикуляр к этой плоскости. Следовательно, угол $\angle C_1AD_1 = 30^\circ$.Рассмотрим треугольник $\triangle AC_1D_1$. Он является прямоугольным, поскольку ребро $C_1D_1$ перпендикулярно грани $ADD_1A_1$, а значит, и прямой $AD_1$, лежащей в этой грани ($\angle AD_1C_1 = 90^\circ$). Катет $C_1D_1$, лежащий напротив угла в $30^\circ$, является одним из измерений параллелепипеда. Обозначим его как $a$. Из соотношений в прямоугольном треугольнике имеем:$a = C_1D_1 = d \cdot \sin(30^\circ) = 18 \cdot \frac{1}{2} = 9$ см.

2. Нахождение второго измерения (высоты).Угол между диагональю $AC_1$ и боковым ребром составляет $45^\circ$. В качестве бокового ребра выберем $AA_1$. Угол между ними — это $\angle A_1AC_1 = 45^\circ$.Рассмотрим треугольник $\triangle AA_1C_1$. Он является прямоугольным, так как боковое ребро $AA_1$ перпендикулярно плоскости основания $A_1B_1C_1D_1$, а значит, и диагонали основания $A_1C_1$ ($\angle AA_1C_1 = 90^\circ$). Высота параллелепипеда $c = AA_1$ является катетом, прилежащим к углу в $45^\circ$. Тогда:$c = AA_1 = d \cdot \cos(45^\circ) = 18 \cdot \frac{\sqrt{2}}{2} = 9\sqrt{2}$ см.

3. Нахождение третьего измерения.Квадрат диагонали прямоугольного параллелепипеда равен сумме квадратов трёх его измерений: $d^2 = a^2 + b^2 + c^2$. Мы уже нашли два измерения: $a = 9$ см и $c = 9\sqrt{2}$ см. Найдем третье измерение $b$.Выразим $b^2$ из формулы:$b^2 = d^2 - a^2 - c^2$Подставим известные значения:$b^2 = 18^2 - 9^2 - (9\sqrt{2})^2 = 324 - 81 - (81 \cdot 2) = 324 - 81 - 162 = 324 - 243 = 81$$b = \sqrt{81} = 9$ см.

4. Вычисление объёма.Теперь, когда известны все три измерения параллелепипеда ($a=9$ см, $b=9$ см, $c=9\sqrt{2}$ см), мы можем вычислить его объём:$V = a \cdot b \cdot c = 9 \cdot 9 \cdot 9\sqrt{2} = 729\sqrt{2} \text{ см}^3$.

Ответ: $729\sqrt{2} \text{ см}^3$.

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