Question

calcule a diagonal, a área total e o volume de um cubo de 3 cm de aresta

Answer 1

$\large\boxed{\begin{array}{l}\underline{\rm diagonal~do~cubo}\\\sf D=\ell\sqrt{3}\\\sf D=3\sqrt{3}~cm\\\underline{\rm \acute area~total~do~cubo}\\\sf A_t=6\cdot\ell^2\\\sf A_t=6\cdot3^2\\\sf A_t=6\cdot9\\\sf A=54~cm^2\\\underline{\rm volume~do~cubo}\\\sf V=\ell^3\\\sf V=3^3\\\sf V=27~cm^3\end{array}}$