Предмет: Геометрия, автор: Marinochka16

Найдите площадь полной поверхности и объем куба, если его диагональ равна 8 см. Спасибо!

Ответы

Автор ответа: Ivanna2013

d²=3a²

64=3a²

a²=64/3

a=8√3/3

S=6*(8√3/3)²=6*64/3=128

V=(8√3/3)³=512√3/9

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