Question

(URGENTE) Qual o lado do cubo cuja diagonal mede b?

Answer 1

Sendo L o lado do cubo

           $d^2 = L^2+L^2+L^2 \\ \\ b^2=3L^2 \\ \\ L^2= \frac{b^2}{3} \\ \\ L= \sqrt{ \frac{b^2}{3} } \\ \\ L= \frac{b}{ \sqrt{3} } \\ \\ L= \frac{b \sqrt{3} }{3}$