Предмет: Математика, автор: karinalol01

ребро куба 3 дм. найдите сумму длин всех его рёбер, площадь поверхности и объём .
помогите пожалуйста СРОЧНО​

Ответы

Автор ответа: Saharok07
0

Ответ:

Объём куба: V=a^3; V=3^3=27 дм^3

Площадь поверхности: Sпов=6*a^2; Sпов=6*3^2=54 дм^2

Сумма длин всех рёбер: а*12, т.к. граней(рёбер) именно 12; 3*12=36 дм

Пошаговое объяснение:

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