Номер 344, страница 94 - 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 1. Цилиндр - номер 344, страница 94.

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                    "created_at" => "2026-04-10 13:58:26"
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                    "field_process_formula" => "wiris"
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            "task" => array:2 [
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            "text" => "<p> <b>344.</b> Цилиндр получен вращением квадрата со стороной <i>а</i> вокруг одной из его сторон. Найдите площадь: </p> <p> а) осевого сечения цилиндра; </p> <p> б) боковой поверхности цилиндра; </p> <p> в) полной поверхности цилиндра. </p>"
            "img" => array:1 [
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                "name" => "344-1.jpg"
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                "width" => "1564"
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            "created_at" => "2026-04-10 13:58:26"
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            "edition" => Illuminate\Database\Eloquent\Collection {#1166}
            "task" => array:2 [
              "refs" => "744759"
              "type" => "task"
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            "text" => "<p> <b>344.</b> Цилиндр получен вращением квадрата со стороной <i>а</i> вокруг одной из его сторон. Найдите площадь: </p> <p> а) осевого сечения цилиндра; </p> <p> б) боковой поверхности цилиндра; </p> <p> в) полной поверхности цилиндра. </p>"
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          #guarded: array:1 [
            0 => "*"
          ]
        }
        1 => App\Models\Element {#1172
          #connection: "mysql"
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          #attributes: array:6 [
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            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "edition" => Illuminate\Database\Eloquent\Collection {#1173
              #items: array:1 [
                0 => App\Models\Edition {#1174
                  #connection: "mysql"
                  #table: "editions"
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                  #perPage: 15
                  +exists: true
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                  #escapeWhenCastingToString: false
                  #attributes: array:21 [ …21]
                  #original: array:21 [ …21]
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                  #guarded: array:1 [ …1]
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            "updated_at" => null
            "edition" => Illuminate\Database\Eloquent\Collection {#1173}
            "task" => array:2 [
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            "img" => array:1 [
              0 => array:5 [
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        2 => App\Models\Element {#1180
          #connection: "mysql"
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          #attributes: array:6 [
            "id" => 941192
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "edition" => Illuminate\Database\Eloquent\Collection {#1181
              #items: array:1 [
                0 => App\Models\Edition {#1182
                  #connection: "mysql"
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                  #perPage: 15
                  +exists: true
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                  #escapeWhenCastingToString: false
                  #attributes: array:21 [ …21]
                  #original: array:21 [ …21]
                  #changes: []
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                  +timestamps: true
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                  #guarded: array:1 [ …1]
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            "task" => array:2 [
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            "img" => array:1 [
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                "path" => "/media/geometrija_10/atanasjan-u23/3-00/344-1.webp?ts=1739436811"
              ]
            ]
          ]
          #original: array:6 [
            "id" => 941192
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "edition" => Illuminate\Database\Eloquent\Collection {#1181}
            "task" => array:2 [
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            "img" => array:1 [
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        3 => App\Models\Element {#1188
          #connection: "mysql"
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          #attributes: array:6 [
            "id" => 940856
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "edition" => Illuminate\Database\Eloquent\Collection {#1189
              #items: array:1 [
                0 => App\Models\Edition {#1190
                  #connection: "mysql"
                  #table: "editions"
                  #primaryKey: "id"
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                  +incrementing: false
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                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
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                  #escapeWhenCastingToString: false
                  #attributes: array:21 [ …21]
                  #original: array:21 [ …21]
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                  #guarded: array:1 [ …1]
                }
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            "task" => array:2 [
              "refs" => "744759"
              "type" => "task"
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            "img" => array:1 [
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                "name" => "344-1.jpg"
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                "width" => "1373"
                "height" => 356
                "path" => "/media/geometrija_10/atanasjan-u23/4-00/344-1.webp?ts=1739436529"
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          #original: array:6 [
            "id" => 940856
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "edition" => Illuminate\Database\Eloquent\Collection {#1189}
            "task" => array:2 [
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            "img" => array:1 [
              0 => array:5 [
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                "width" => "1373"
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        4 => App\Models\Element {#1196
          #connection: "mysql"
          #table: "elements"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
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          #escapeWhenCastingToString: false
          #attributes: array:6 [
            "id" => 941086
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "edition" => Illuminate\Database\Eloquent\Collection {#1197
              #items: array:1 [
                0 => App\Models\Edition {#1198
                  #connection: "mysql"
                  #table: "editions"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
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                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
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                  #attributes: array:21 [ …21]
                  #original: array:21 [ …21]
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                  #guarded: array:1 [ …1]
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              #escapeWhenCastingToString: false
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            "task" => array:2 [
              "refs" => "744759"
              "type" => "task"
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            "img" => array:1 [
              0 => array:5 [
                "name" => "344-1.jpg"
                "alt" => null
                "width" => "395"
                "height" => 376
                "path" => "/media/geometrija_10/atanasjan-u23/5-00/344-1.webp?ts=1739436558"
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          ]
          #original: array:6 [
            "id" => 941086
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "edition" => Illuminate\Database\Eloquent\Collection {#1197}
            "task" => array:2 [
              "refs" => "744759"
              "type" => "task"
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            "img" => array:1 [
              0 => array:5 [
                "name" => "344-1.jpg"
                "alt" => null
                "width" => "395"
                "height" => 376
                "path" => "/media/geometrija_10/atanasjan-u23/5-00/344-1.webp?ts=1739436558"
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            0 => "*"
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        }
        5 => App\Models\Element {#1204
          #connection: "mysql"
          #table: "elements"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
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          #attributes: array:6 [
            "id" => 1352072
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "edition" => Illuminate\Database\Eloquent\Collection {#1205
              #items: array:1 [
                0 => App\Models\Edition {#1206
                  #connection: "mysql"
                  #table: "editions"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
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                  #perPage: 15
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                  #attributes: array:21 [ …21]
                  #original: array:21 [ …21]
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              ]
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            "task" => array:2 [
              "refs" => "744759"
              "type" => "task"
            ]
            "text" => "<p>Цилиндр получен вращением квадрата со стороной $a$ вокруг одной из его сторон. Это означает, что высота цилиндра $h$ равна стороне квадрата, и радиус основания цилиндра $r$ также равен стороне квадрата. Таким образом, мы имеем:<br>Высота $h = a$.<br>Радиус $r = a$.</p><p><strong>а) осевого сечения цилиндра</strong></p><p>Осевое сечение цилиндра представляет собой прямоугольник. Одна сторона этого прямоугольника равна высоте цилиндра $h$, а другая — его диаметру $d$.<br>Высота сечения равна высоте цилиндра: $h = a$.<br>Ширина сечения равна диаметру основания: $d = 2r = 2a$.<br>Площадь осевого сечения $S_{сеч}$ равна произведению его сторон:<br>$S_{сеч} = h \cdot d = a \cdot 2a = 2a^2$.<br>Ответ: $2a^2$.</p><p><strong>б) боковой поверхности цилиндра</strong></p><p>Площадь боковой поверхности цилиндра $S_{бок}$ вычисляется по формуле:<br>$S_{бок} = 2 \pi r h$<br>Подставим наши значения $r=a$ и $h=a$:<br>$S_{бок} = 2 \pi \cdot a \cdot a = 2\pi a^2$.<br>Ответ: $2\pi a^2$.</p><p><strong>в) полной поверхности цилиндра</strong></p><p>Площадь полной поверхности цилиндра $S_{полн}$ — это сумма площади боковой поверхности и площадей двух оснований (двух кругов).<br>Площадь одного основания $S_{осн}$ вычисляется по формуле: $S_{осн} = \pi r^2$.<br>Так как $r=a$, то $S_{осн} = \pi a^2$.<br>Площадь полной поверхности равна:<br>$S_{полн} = S_{бок} + 2 \cdot S_{осн} = 2\pi a^2 + 2 \cdot (\pi a^2) = 2\pi a^2 + 2\pi a^2 = 4\pi a^2$.<br>Ответ: $4\pi a^2$.</p>"
          ]
          #original: array:6 [
            "id" => 1352072
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "edition" => Illuminate\Database\Eloquent\Collection {#1205}
            "task" => array:2 [
              "refs" => "744759"
              "type" => "task"
            ]
            "text" => "<p>Цилиндр получен вращением квадрата со стороной $a$ вокруг одной из его сторон. Это означает, что высота цилиндра $h$ равна стороне квадрата, и радиус основания цилиндра $r$ также равен стороне квадрата. Таким образом, мы имеем:<br>Высота $h = a$.<br>Радиус $r = a$.</p><p><strong>а) осевого сечения цилиндра</strong></p><p>Осевое сечение цилиндра представляет собой прямоугольник. Одна сторона этого прямоугольника равна высоте цилиндра $h$, а другая — его диаметру $d$.<br>Высота сечения равна высоте цилиндра: $h = a$.<br>Ширина сечения равна диаметру основания: $d = 2r = 2a$.<br>Площадь осевого сечения $S_{сеч}$ равна произведению его сторон:<br>$S_{сеч} = h \cdot d = a \cdot 2a = 2a^2$.<br>Ответ: $2a^2$.</p><p><strong>б) боковой поверхности цилиндра</strong></p><p>Площадь боковой поверхности цилиндра $S_{бок}$ вычисляется по формуле:<br>$S_{бок} = 2 \pi r h$<br>Подставим наши значения $r=a$ и $h=a$:<br>$S_{бок} = 2 \pi \cdot a \cdot a = 2\pi a^2$.<br>Ответ: $2\pi a^2$.</p><p><strong>в) полной поверхности цилиндра</strong></p><p>Площадь полной поверхности цилиндра $S_{полн}$ — это сумма площади боковой поверхности и площадей двух оснований (двух кругов).<br>Площадь одного основания $S_{осн}$ вычисляется по формуле: $S_{осн} = \pi r^2$.<br>Так как $r=a$, то $S_{осн} = \pi a^2$.<br>Площадь полной поверхности равна:<br>$S_{полн} = S_{бок} + 2 \cdot S_{осн} = 2\pi a^2 + 2 \cdot (\pi a^2) = 2\pi a^2 + 2\pi a^2 = 4\pi a^2$.<br>Ответ: $4\pi a^2$.</p>"
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    "book" => Illuminate\Database\Eloquent\Collection {#1250
      #items: array:1 [
        0 => App\Models\Book {#1214
          #connection: "mysql"
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            "created_at" => "2026-04-10 13:58:26"
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            "field_subject" => Illuminate\Database\Eloquent\Collection {#1215
              #items: array:1 [
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                  #attributes: array:10 [ …10]
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            "field_class" => Illuminate\Database\Eloquent\Collection {#1216
              #items: array:2 [
                0 => App\Models\Term {#1217
                  #connection: "mysql"
                  #table: "terms"
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                  #perPage: 15
                  +exists: true
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                  #attributes: array:6 [ …6]
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                  +timestamps: true
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                  #fillable: []
                  #guarded: array:1 [ …1]
                }
                1 => App\Models\Term {#1218
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
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                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:6 [ …6]
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                }
              ]
              #escapeWhenCastingToString: false
            }
            "field_publisher" => Illuminate\Database\Eloquent\Collection {#1219
              #items: array:1 [
                0 => App\Models\Term {#1220
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
                  #with: []
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                  +wasRecentlyCreated: false
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                  #attributes: array:6 [ …6]
                  #original: array:6 [ …6]
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                  #hidden: []
                  #visible: []
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                }
              ]
              #escapeWhenCastingToString: false
            }
            "field_author" => Illuminate\Database\Eloquent\Collection {#1221
              #items: array:5 [
                0 => App\Models\Term {#1222
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
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                  #attributes: array:12 [ …12]
                  #original: array:12 [ …12]
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                  #attributeCastCache: []
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                  +timestamps: true
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                  #hidden: []
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                  #fillable: []
                  #guarded: array:1 [ …1]
                }
                1 => App\Models\Term {#1223
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
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                  #escapeWhenCastingToString: false
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                  #original: array:12 [ …12]
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                  +timestamps: true
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                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [ …1]
                }
                2 => App\Models\Term {#1224
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
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                  #attributes: array:12 [ …12]
                  #original: array:12 [ …12]
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                  #attributeCastCache: []
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                }
                3 => App\Models\Term {#1225
                  #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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                  #visible: []
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                  #guarded: array:1 [ …1]
                }
                4 => App\Models\Term {#1226
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
                  #with: []
                  #withCount: []
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                  #attributes: array:12 [ …12]
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                  #visible: []
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                }
              ]
              #escapeWhenCastingToString: false
            }
            "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1227
              #items: []
              #escapeWhenCastingToString: false
            }
            "field_book_type" => Illuminate\Database\Eloquent\Collection {#1228
              #items: array:1 [
                0 => App\Models\Term {#1229
                  #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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                  #touches: []
                  +timestamps: true
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                  #hidden: []
                  #visible: []
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                  #guarded: array:1 [ …1]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "field_country" => Illuminate\Database\Eloquent\Collection {#1230
              #items: array:1 [
                0 => App\Models\Term {#1231
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
                  #with: []
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                  +preventsLazyLoading: false
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                  #original: array:6 [ …6]
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                  #hidden: []
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                  #guarded: array:1 [ …1]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "field_city" => Illuminate\Database\Eloquent\Collection {#1232
              #items: array:1 [
                0 => App\Models\Term {#1233
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
                  #with: []
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                }
              ]
              #escapeWhenCastingToString: false
            }
            "field_series" => Illuminate\Database\Eloquent\Collection {#1234
              #items: []
              #escapeWhenCastingToString: false
            }
            "field_umk" => Illuminate\Database\Eloquent\Collection {#1235
              #items: []
              #escapeWhenCastingToString: false
            }
            "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1236
              #items: array:1 [
                0 => App\Models\Term {#1237
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
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                  #hidden: []
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                  #guarded: array:1 [ …1]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1238
              #items: array:1 [
                0 => App\Models\Term {#1239
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
                  #with: []
                  #withCount: []
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                  #attributes: array:10 [ …10]
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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 {#1240
              #items: array:1 [
                0 => App\Models\Term {#1241
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
                  #with: []
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                }
              ]
              #escapeWhenCastingToString: false
            }
            "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1242
              #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 {#1243
              #items: []
              #escapeWhenCastingToString: false
            }
            "field_new_book" => Illuminate\Database\Eloquent\Collection {#1244
              #items: []
              #escapeWhenCastingToString: false
            }
            "field_old_book" => Illuminate\Database\Eloquent\Collection {#1245
              #items: []
              #escapeWhenCastingToString: false
            }
            "field_url" => "/10-klass/geometrija/atanasjan-uchebnik"
            "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1246
              #items: array:1 [
                0 => App\Models\Term {#1247
                  #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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                }
              ]
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            }
            "field_metatags_title" => null
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            "field_description_bottom" => null
            "breadcrumbs" => array:3 [
              "class" => 381
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              "class_subject" => 392
            ]
          ]
          #original: array:50 [
            "id" => 36
            "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 {#1215}
            "field_class" => Illuminate\Database\Eloquent\Collection {#1216}
            "field_publisher" => Illuminate\Database\Eloquent\Collection {#1219}
            "field_author" => Illuminate\Database\Eloquent\Collection {#1221}
            "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1227}
            "field_book_type" => Illuminate\Database\Eloquent\Collection {#1228}
            "field_country" => Illuminate\Database\Eloquent\Collection {#1230}
            "field_city" => Illuminate\Database\Eloquent\Collection {#1232}
            "field_series" => Illuminate\Database\Eloquent\Collection {#1234}
            "field_umk" => Illuminate\Database\Eloquent\Collection {#1235}
            "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1236}
            "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1238}
            "field_publication_number" => "11"
            "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1240}
            "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1242}
            "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 => ""
            ]
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              0 => array:4 [
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                "alt" => ""
                "width" => "1200"
                "height" => "1661"
              ]
            ]
            "field_popular_book" => null
            "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1243}
            "field_new_book" => Illuminate\Database\Eloquent\Collection {#1244}
            "field_old_book" => Illuminate\Database\Eloquent\Collection {#1245}
            "field_url" => "/10-klass/geometrija/atanasjan-uchebnik"
            "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1246}
            "field_metatags_title" => null
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            "breadcrumbs" => array:3 [
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          ]
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            0 => "*"
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        }
      ]
      #escapeWhenCastingToString: false
    }
    "page" => Illuminate\Database\Eloquent\Collection {#1399
      #items: array:1 [
        0 => App\Models\BookPage {#1032
          #connection: "mysql"
          #table: "book_pages"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
          +preventsLazyLoading: false
          #perPage: 15
          +exists: true
          +wasRecentlyCreated: false
          #escapeWhenCastingToString: false
          #attributes: array:21 [
            "id" => 933876
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_page_start" => "94"
            "field_url" => "/10-klass/geometrija/atanasjan-uchebnik/page-94"
            "field_display_title" => "94"
            "field_folder" => "1"
            "field_image_name" => "94"
            "field_branch_parent" => Illuminate\Database\Eloquent\Collection {#1023
              #items: []
              #escapeWhenCastingToString: false
            }
            "field_weight" => "0"
            "field_book_parent" => Illuminate\Database\Eloquent\Collection {#1026
              #items: array:1 [
                0 => App\Models\Book {#1248
                  #connection: "mysql"
                  #table: "books"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
                  #with: []
                  #withCount: []
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                  #escapeWhenCastingToString: false
                  #attributes: array:50 [ …50]
                  #original: array:50 [ …50]
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                  #touches: []
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                  #hidden: []
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                  #guarded: array:1 [ …1]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#1284
              #items: []
              #escapeWhenCastingToString: false
            }
            "content" => Illuminate\Database\Eloquent\Collection {#1285
              #items: array:1 [
                0 => App\Models\Element {#1286
                  #connection: "mysql"
                  #table: "elements"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
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                  #escapeWhenCastingToString: false
                  #attributes: array:6 [ …6]
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                  #touches: []
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                  #hidden: []
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                  #guarded: array:1 [ …1]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "next" => array:2 [
              "refs" => "933877"
              "type" => "book_page"
            ]
            "previous" => array:2 [
              "refs" => "933875"
              "type" => "book_page"
            ]
            "tasks" => Illuminate\Database\Eloquent\Collection {#1294
              #items: array:3 [
                0 => App\Models\Task {#1295
                  #connection: "mysql"
                  #table: "tasks"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
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№344 (с. 94)
Условие. №344 (с. 94)
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 94, номер 344, Условие

344. Цилиндр получен вращением квадрата со стороной а вокруг одной из его сторон. Найдите площадь:

а) осевого сечения цилиндра;

б) боковой поверхности цилиндра;

в) полной поверхности цилиндра.

Решение 2. №344 (с. 94)
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 94, номер 344, Решение 2
Решение 3. №344 (с. 94)
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 94, номер 344, Решение 3
Решение 4. №344 (с. 94)
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 94, номер 344, Решение 4
Решение 5. №344 (с. 94)
Решение 6. №344 (с. 94)

Цилиндр получен вращением квадрата со стороной $a$ вокруг одной из его сторон. Это означает, что высота цилиндра $h$ равна стороне квадрата, и радиус основания цилиндра $r$ также равен стороне квадрата. Таким образом, мы имеем:
Высота $h = a$.
Радиус $r = a$.

а) осевого сечения цилиндра

Осевое сечение цилиндра представляет собой прямоугольник. Одна сторона этого прямоугольника равна высоте цилиндра $h$, а другая — его диаметру $d$.
Высота сечения равна высоте цилиндра: $h = a$.
Ширина сечения равна диаметру основания: $d = 2r = 2a$.
Площадь осевого сечения $S_{сеч}$ равна произведению его сторон:
$S_{сеч} = h \cdot d = a \cdot 2a = 2a^2$.
Ответ: $2a^2$.

б) боковой поверхности цилиндра

Площадь боковой поверхности цилиндра $S_{бок}$ вычисляется по формуле:
$S_{бок} = 2 \pi r h$
Подставим наши значения $r=a$ и $h=a$:
$S_{бок} = 2 \pi \cdot a \cdot a = 2\pi a^2$.
Ответ: $2\pi a^2$.

в) полной поверхности цилиндра

Площадь полной поверхности цилиндра $S_{полн}$ — это сумма площади боковой поверхности и площадей двух оснований (двух кругов).
Площадь одного основания $S_{осн}$ вычисляется по формуле: $S_{осн} = \pi r^2$.
Так как $r=a$, то $S_{осн} = \pi a^2$.
Площадь полной поверхности равна:
$S_{полн} = S_{бок} + 2 \cdot S_{осн} = 2\pi a^2 + 2 \cdot (\pi a^2) = 2\pi a^2 + 2\pi a^2 = 4\pi a^2$.
Ответ: $4\pi a^2$.

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