Предмет: Алгебра, автор: vikaaaaaaaaaaaaa

Ребро куба = а. Знайдіть довжину діагоналі грані куб.

Ответы

Автор ответа: dtnth

По теоремі Піфагора діагональ грані куба дорівнює

$d=sqrt{a^2+a^2}=asqrt{2}$

ЗА властивістю прямокутного паралеллепіпеда діагональ куба дорівнює

$D=sqrt{a^2+a^2+a^2}=asqrt{3}$

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