Question

Ex3 va rog
Dau coroana și puncte

Answer 1

Răspuns:

Explicație pas cu pas:

Answer 2

$\it \mathcal{P}_{ABC}=18+16+14=48\ cm$

$\it \left.\begin{aligned}\ \it \angle A\equiv\angle D\\ \\ \it \angle B\equiv\angle E\end{aligned}\right\}\ \stackrel{(UU)}{\Longrightarrow} \Delta ABC \sim\Delta D EF \Rightarrow k=\dfrac{AB}{DE}=\dfrac{\ 18^{(6}}{12}=\dfrac{3}{2}\\ \\ \\ \dfrac{\mathcal{P}_{ABC}}{\mathcal{P}_{D EF}}=k \Rightarrow \dfrac{48}{\mathcal{P}_{D EF}}=\dfrac{3}{2} \Rightarrow \mathcal{P}_{D EF}=\dfrac{2\cdot48}{3}=2\cdot16=32\ cm$