Предмет: Математика, автор: Welgiz

Найдите площадь поверхности и сумму длин рёбер куба, ребро которого 11 см.

Ответы

Автор ответа: Stushanka
0

всего 12 ребер, 12*11 = 132 см 

и 11² =121 площадь поверхности

Автор ответа: АришаТиша
0

у куба 12 ребер и поверхность, состоящая из 6 квадратов со стороной 11 см.

Sкв.=а*а=а²=11²=121 см²

S поверх. куба=Sкв.*6=121*6=726 см²

2) 11*12=132 см - сумма длин ребер

Ответ: сумма длин ребер куба - 132 см, площадь поверхности - 726 см².

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