Question

calcule a área e o perímetro do retângunlo abaixo:
.
_____________
| |
| | 2a
| |
|_____________|
3b​

Answer 1

$\boxed{\begin{array}{l}\underline{\rm per\acute imetro~do~ret\hat angulo}\\\underline{\rm de~dimens\tilde oes~c~e~\ell}\\\sf p=2\cdot(c+\ell)\\\underline{\rm \acute area~do~ret\hat angulo~de~dimens\tilde oes~c~e~\ell}\\\sf A=c\cdot\ell.\\\sf p=2\cdot(2a+3b)\\\sf p=4a+6b\\\sf A=2a\cdot 3b\\\sf A=6ab\end{array}}$