Предмет: Геометрия, автор: Grend

В правильной треугольной усеченной пирамиде стороны основания равны 4 см и 7 см,величина двугранного угла при нижнем основании равна 30 градусов.Найти площадь ее боковой поверхности

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Автор ответа: irinan2014

Всё подробно написала в решении.

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