Question

Perímetro (P) do retângulo é a soma dos seus lados. O perímetro (P) do retângulo 15√3 cm e 6√3 cm é?

Answer 1

$\Large\boxed{\begin{array}{l}\underline{\rm Per\acute imetro\,do\,ret\hat angulo}\\\underline{\rm de\,dimens\tilde oes\,c\,e\,\ell}\\\sf P=2\cdot(c+\ell)\\\sf c\longrightarrow comprimento\\\sf \ell\longrightarrow largura\end{array}}$

$\Large\boxed{\begin{array}{l}\sf c=15\sqrt{3}\,cm~~~~~\ell=6\sqrt{3}\,cm\\\sf P=2\cdot(15\sqrt{3}+6\sqrt{3})\\\sf P=2\cdot21\sqrt{3}\\\sf P=42\sqrt{3}\,cm\end{array}}$