Предмет: Геометрия, автор: kotik910

Найдите площадь прямоугольника, меньшая сторона котрого равна 5 см, а диагональ 12 см

Ответы

Автор ответа: Катюша123456711

Диагональ основания 12см.Осевое сочение - равнобедренный треугольник с острыми углами по 45 градусов , значит его третий угол 90 градусов. Тогда высота пирамиды равна 6см . Площадь осевого сочения равна 0,5*12*6=36(кв.см)

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