Question

Se considera triunghiul ABC in care AB=16,D apartine lui AB,AD=4 si DE||Bc,E apartine lui AC.Daca DE=6,atunci BC=...?

Answer 1

DE ll BC ⇒ ΔABC ≈ ΔADE ⇒ 

$\frac{AD}{AB} = \frac{AE}{AC} = \frac{DE}{BC}$⇔$\frac{4}{16} = \frac{6}{BC}$ ⇒ BC = $\frac{14*6}{4} =21$


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