Question

un dreptunghi are aria egala cu 98 cm patrati si lungimea egala cu dublul latimii calculati lungumra latimea si perimetrul am nevoie repede va roog​

Answer 1

$\it L=2\ell\ \ \ \ \ (1)\\ \\ 98=\mathcal{A}=L\cdot\ell\ \stackrel{(1)}{=}2\ell\cdot \ell|_{:2} \Rightarrow 49=\ell\cdot\ell \Rightarrow \ell=7\ cm\ \ \ \ (2)\\ \\ (1),\ (2) \Rightarrow L=2\cdot7=14\ cm\\ \\ \mathcal{P}=2\cdot(L+\ell)=2\cdot(14+7)=2\cdot21=42\ cm$

Answer 2

Sper ca ajuta!!!! Spoor!