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боковое ребро правильной треугольной пирамиды равно 10м .,а сторона основания 10 м. Найдите площадь боковой поверхности пирамиды.
Ответы 1
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Sбок=1/2*Pосн*LL - длина апофемыPосн=3*10=30L= \sqrt{100-25} = \sqrt{75} =5 \sqrt{3} Sбок=1/2*30*5√3=75√3
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Автор:
esperanzaizi0 - 1 год назад
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4
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