Номер 409, страница 113 - 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 4. Цилиндр, конус и шар. Параграф 3. Сфера, дополнительные задачи - номер 409, страница 113.

App\Models\Task {#1024 // resources/views/models/task/default.blade.php
  #connection: "mysql"
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    "field_outside_task" => null
    "field_task_type" => Illuminate\Database\Eloquent\Collection {#331
      #items: array:1 [
        0 => App\Models\Term {#1029
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                            "field_cases" => array:6 [ …6]
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                    "field_class" => Illuminate\Database\Eloquent\Collection {#1036
                      #items: array:2 [
                        0 => App\Models\Term {#1037
                          #connection: "mysql"
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                            "created_at" => "2026-04-10 13:58:26"
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                          #original: array:6 [
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                            "created_at" => "2026-04-10 13:58:26"
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                        1 => App\Models\Term {#1038
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                            "created_at" => "2026-04-10 13:58:26"
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                            "field_translit" => "odinadcatyj"
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                          #original: array:6 [
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                            "created_at" => "2026-04-10 13:58:26"
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                            "field_translit" => "odinadcatyj"
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                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1039
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                        0 => App\Models\Term {#1040
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                        1 => App\Models\Term {#1043
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                        2 => App\Models\Term {#1044
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                        3 => App\Models\Term {#1045
                          #connection: "mysql"
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                             …3
                          ]
                          #original: array:12 [ …12]
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                        4 => App\Models\Term {#1046
                          #connection: "mysql"
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                        0 => App\Models\Term {#1049
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                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
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                          #attributes: array:10 [ …10]
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                          #touches: []
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                          #hidden: []
                          #visible: []
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                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_country" => Illuminate\Database\Eloquent\Collection {#1050
                      #items: array:1 [
                        0 => App\Models\Term {#1051
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
                          #with: []
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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]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_city" => Illuminate\Database\Eloquent\Collection {#1052
                      #items: array:1 [
                        0 => App\Models\Term {#1053
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
                          #with: []
                          #withCount: []
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                          #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_series" => Illuminate\Database\Eloquent\Collection {#1054
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_umk" => Illuminate\Database\Eloquent\Collection {#1055
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1056
                      #items: array:1 [
                        0 => App\Models\Term {#1057
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
                          #with: []
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                          #attributes: array:6 [ …6]
                          #original: array:6 [ …6]
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                          #dateFormat: null
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                          #relations: []
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                          #visible: []
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                          #guarded: array:1 [ …1]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1058
                      #items: array:1 [
                        0 => App\Models\Term {#1059
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
                          #with: []
                          #withCount: []
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                          #attributes: array:10 [ …10]
                          #original: array:10 [ …10]
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                          #dateFormat: null
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                          +timestamps: true
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                          #hidden: []
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                          #guarded: array:1 [ …1]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_publication_number" => "11"
                    "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1060
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                        0 => App\Models\Term {#1061
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
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                          #withCount: []
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                          #attributes: array:6 [ …6]
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                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1062
                      #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 {#1063
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                      #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" => "/10-klass/geometrija/atanasjan-uchebnik"
                    "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1066
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                        0 => App\Models\Term {#1067
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
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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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                    ]
                  ]
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                    "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 {#1034}
                    "field_class" => Illuminate\Database\Eloquent\Collection {#1036}
                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1039}
                    "field_author" => Illuminate\Database\Eloquent\Collection {#1041}
                    "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1047}
                    "field_book_type" => Illuminate\Database\Eloquent\Collection {#1048}
                    "field_country" => Illuminate\Database\Eloquent\Collection {#1050}
                    "field_city" => Illuminate\Database\Eloquent\Collection {#1052}
                    "field_series" => Illuminate\Database\Eloquent\Collection {#1054}
                    "field_umk" => Illuminate\Database\Eloquent\Collection {#1055}
                    "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1056}
                    "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1058}
                    "field_publication_number" => "11"
                    "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1060}
                    "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1062}
                    "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/"
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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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                      0 => array:4 [
                        "path" => "/media/geometrija_10/atanasjan-u23/covers/cover1.webp?ts=1739363242"
                        "alt" => ""
                        "width" => "1200"
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                      ]
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                    "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" => "/10-klass/geometrija/atanasjan-uchebnik"
                    "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1066}
                    "field_metatags_title" => null
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                    ]
                  ]
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                    0 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
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            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1068
              #items: []
              #escapeWhenCastingToString: false
            }
          ]
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            "updated_at" => null
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            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#333}
            "field_page_start" => "89"
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            "field_branch_covers" => []
            "book" => Illuminate\Database\Eloquent\Collection {#1030}
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          ]
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            0 => "*"
          ]
        }
      ]
      #escapeWhenCastingToString: false
    }
    "parent_branches" => Illuminate\Database\Eloquent\Collection {#1069
      #items: array:2 [
        0 => App\Models\Branch {#1023}
        1 => App\Models\Branch {#1070
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          #table: "branches"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
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          +exists: true
          +wasRecentlyCreated: false
          #escapeWhenCastingToString: false
          #attributes: array:24 [
            "id" => 744391
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => "Сфера, дополнительные задачи"
            "field_branch_order" => "3"
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1071
              #items: array:1 [
                0 => App\Models\Term {#1072
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
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                  #attributes: array:7 [
                    "id" => 32
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "Параграф"
                    "field_cases" => array:6 [ …6]
                    "field_page_check_not_needed" => null
                    "field_short_name" => "§"
                  ]
                  #original: array:7 [
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                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "Параграф"
                    "field_cases" => array:6 [ …6]
                    "field_page_check_not_needed" => null
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                  ]
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                    0 => "*"
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              ]
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            "book" => Illuminate\Database\Eloquent\Collection {#1073
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              ]
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            }
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1074
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                0 => App\Models\Branch {#1075
                  #connection: "mysql"
                  #table: "branches"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
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                  #attributes: array:24 [
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                    "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1076 …2}
                    "field_page_start" => "89"
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                    "book" => Illuminate\Database\Eloquent\Collection {#1077 …2}
                    "branch_parent" => Illuminate\Database\Eloquent\Collection {#1078 …2}
                  ]
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                    "book" => Illuminate\Database\Eloquent\Collection {#1077 …2}
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            "book" => Illuminate\Database\Eloquent\Collection {#1073}
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                    "title" => "Решение 6"
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            "text" => "<p>Пусть $l$ — длина образующей конуса, $r$ — радиус его основания, а $H$ — высота. Угол, который необходимо найти, — это угол $\alpha$ между образующей $l$ и высотой $H$. Эти три элемента образуют прямоугольный треугольник, в котором образующая $l$ является гипотенузой, а высота $H$ и радиус $r$ — катетами. Угол $\alpha$ является острым углом этого треугольника, лежащим между катетом $H$ и гипотенузой $l$.</p><p>Развёртка боковой поверхности конуса представляет собой сектор круга. Радиус этого сектора равен длине образующей конуса $l$. Длина дуги этого сектора равна длине окружности основания конуса, которая вычисляется по формуле $C = 2\pi r$.</p><p>Согласно условию, центральный угол сектора равен $\theta = 270°$. Длина дуги сектора с радиусом $l$ и углом $\theta$ находится по формуле: $L_{дуги} = \frac{\theta}{360°} \cdot 2\pi l$</p><p>Подставим в формулу данное значение угла $\theta$: $L_{дуги} = \frac{270°}{360°} \cdot 2\pi l = \frac{3}{4} \cdot 2\pi l = \frac{3}{2}\pi l$</p><p>Так как длина дуги сектора равна длине окружности основания конуса, мы можем приравнять эти два выражения: $2\pi r = \frac{3}{2}\pi l$</p><p>Из этого равенства выразим радиус основания $r$ через образующую $l$: $r = \frac{\frac{3}{2}\pi l}{2\pi} = \frac{3}{4}l$</p><p>Теперь вернемся к прямоугольному треугольнику, образованному высотой, радиусом и образующей. Синус угла $\alpha$ (угла между высотой и образующей) равен отношению противолежащего катета $r$ к гипотенузе $l$: $\sin(\alpha) = \frac{r}{l}$</p><p>Подставим в это соотношение найденное выражение для $r$: $\sin(\alpha) = \frac{\frac{3}{4}l}{l} = \frac{3}{4}$</p><p>Таким образом, искомый угол $\alpha$ равен арксинусу от $\frac{3}{4}$.</p><p>Ответ: $\arcsin(\frac{3}{4})$.</p>"
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            "text" => "<p>Пусть $l$ — длина образующей конуса, $r$ — радиус его основания, а $H$ — высота. Угол, который необходимо найти, — это угол $\alpha$ между образующей $l$ и высотой $H$. Эти три элемента образуют прямоугольный треугольник, в котором образующая $l$ является гипотенузой, а высота $H$ и радиус $r$ — катетами. Угол $\alpha$ является острым углом этого треугольника, лежащим между катетом $H$ и гипотенузой $l$.</p><p>Развёртка боковой поверхности конуса представляет собой сектор круга. Радиус этого сектора равен длине образующей конуса $l$. Длина дуги этого сектора равна длине окружности основания конуса, которая вычисляется по формуле $C = 2\pi r$.</p><p>Согласно условию, центральный угол сектора равен $\theta = 270°$. Длина дуги сектора с радиусом $l$ и углом $\theta$ находится по формуле: $L_{дуги} = \frac{\theta}{360°} \cdot 2\pi l$</p><p>Подставим в формулу данное значение угла $\theta$: $L_{дуги} = \frac{270°}{360°} \cdot 2\pi l = \frac{3}{4} \cdot 2\pi l = \frac{3}{2}\pi l$</p><p>Так как длина дуги сектора равна длине окружности основания конуса, мы можем приравнять эти два выражения: $2\pi r = \frac{3}{2}\pi l$</p><p>Из этого равенства выразим радиус основания $r$ через образующую $l$: $r = \frac{\frac{3}{2}\pi l}{2\pi} = \frac{3}{4}l$</p><p>Теперь вернемся к прямоугольному треугольнику, образованному высотой, радиусом и образующей. Синус угла $\alpha$ (угла между высотой и образующей) равен отношению противолежащего катета $r$ к гипотенузе $l$: $\sin(\alpha) = \frac{r}{l}$</p><p>Подставим в это соотношение найденное выражение для $r$: $\sin(\alpha) = \frac{\frac{3}{4}l}{l} = \frac{3}{4}$</p><p>Таким образом, искомый угол $\alpha$ равен арксинусу от $\frac{3}{4}$.</p><p>Ответ: $\arcsin(\frac{3}{4})$.</p>"
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№409 (с. 113)
Условие. №409 (с. 113)
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 113, номер 409, Условие

409. Найдите угол между образующей и высотой конуса, если развёрткой его боковой поверхности является сектор с дугой 270°.

Решение 2. №409 (с. 113)
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 113, номер 409, Решение 2
Решение 3. №409 (с. 113)
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 113, номер 409, Решение 3
Решение 5. №409 (с. 113)
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 113, номер 409, Решение 5
Решение 6. №409 (с. 113)

Пусть $l$ — длина образующей конуса, $r$ — радиус его основания, а $H$ — высота. Угол, который необходимо найти, — это угол $\alpha$ между образующей $l$ и высотой $H$. Эти три элемента образуют прямоугольный треугольник, в котором образующая $l$ является гипотенузой, а высота $H$ и радиус $r$ — катетами. Угол $\alpha$ является острым углом этого треугольника, лежащим между катетом $H$ и гипотенузой $l$.

Развёртка боковой поверхности конуса представляет собой сектор круга. Радиус этого сектора равен длине образующей конуса $l$. Длина дуги этого сектора равна длине окружности основания конуса, которая вычисляется по формуле $C = 2\pi r$.

Согласно условию, центральный угол сектора равен $\theta = 270°$. Длина дуги сектора с радиусом $l$ и углом $\theta$ находится по формуле: $L_{дуги} = \frac{\theta}{360°} \cdot 2\pi l$

Подставим в формулу данное значение угла $\theta$: $L_{дуги} = \frac{270°}{360°} \cdot 2\pi l = \frac{3}{4} \cdot 2\pi l = \frac{3}{2}\pi l$

Так как длина дуги сектора равна длине окружности основания конуса, мы можем приравнять эти два выражения: $2\pi r = \frac{3}{2}\pi l$

Из этого равенства выразим радиус основания $r$ через образующую $l$: $r = \frac{\frac{3}{2}\pi l}{2\pi} = \frac{3}{4}l$

Теперь вернемся к прямоугольному треугольнику, образованному высотой, радиусом и образующей. Синус угла $\alpha$ (угла между высотой и образующей) равен отношению противолежащего катета $r$ к гипотенузе $l$: $\sin(\alpha) = \frac{r}{l}$

Подставим в это соотношение найденное выражение для $r$: $\sin(\alpha) = \frac{\frac{3}{4}l}{l} = \frac{3}{4}$

Таким образом, искомый угол $\alpha$ равен арксинусу от $\frac{3}{4}$.

Ответ: $\arcsin(\frac{3}{4})$.

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