Предмет: Геометрия, автор: alastria

Развертка боковой поверхности цилиндра является прямоугольником,диагональ которого равна 8см,а угол между диагоналями 30 градусов.Найдите площадь боковой поверхности цилиндра?

Ответы

Автор ответа: mixa91

0

найдем площадь прямоугольника

$s=frac{1}{2}d^{2}*sina$

d- диагональ

sina- угол между диагоналями

S=1/2*64*1/2

S=16 см

Площадь прямоугольника ,в данном случае, и есть площадь боковой поверхности цилиндра

Ответ: 16 см^2

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