Предмет: Геометрия, автор: LoliSehpai

Палатка имеет форму правильной четырёхугольной пирамиды, сторона основания которой равна 48 дм, а высота — 10 дм. Сколько квадратных дециметров ткани необходимо, чтобы сшить саму палатку и её основание...

1. ...не считая расхода материалов на швы и обрезки?
2. ...если на швы и обрезки ещё дополнительно тратится 25 % от необходимого количества ткани?

Ответы

Автор ответа: momogahari

1) Площадь полной поверхности равна сумме площади основания и произведения площади одной боковой грани на их сумму
Ответ: 4800
Остальное во вложении:

Приложения:

momogahari: 2) 4800+4800*0,25=6000

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