Question

qual a diagonal de um cubo de A=
$7 \sqrt{3}$

Answer 1

Diagonal do Cubo:


$D = a \sqrt{3} \\ \\ \\ D = 7\sqrt{3} . (\sqrt{3}) \\ \\ \\ D = 7. (\sqrt{3})^2 \\ \\ \\ D = 7 . 3 \\ \\ \\ D = 21\ cm$