Предмет: Геометрия, автор: Likatolina

найти высоту грани правильной прямоугольной пирамиды высотой 25 см и стороной основания 10см

Ответы

Автор ответа: nafanya2014

0

Пирамида правильная, в основании квадрат со стороной 10 см,
Высота SO=25 см.
ОК перпендикляр к CD. ОК=5 см
SK перпендикуляр к CD
Треугольник SKO - прямоугольный, по теореме Пифагора
SK²=SO²+OK²=25²+5²=625+25=650
SK=√650=5√26 см
Ответ 5√26 см

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