Предмет: Математика, автор: MashaK84

Сумма длин всех рёбер куба равна 60 см. Найдите площадь поверхности куба.

Ответы

Автор ответа: valentina19988

рёбер в кубе 12
длина одного ребра равна 60/12=5см=a
площадь куба P=6*a^2
P=6*5^2=150cм2

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