Question

Encontre o valor de x e y nos triângulos.​

Answer 1

$\boxed{\begin{array}{l}\sf\triangle ABC\sim\triangle CDE(caso~AA).\\\sf\dfrac{y}{\diagdown\!\!\!\!\!15_3}=\dfrac{2}{\diagdown\!\!\!\!\!10_2}\\\sf\dfrac{y}{3}=\dfrac{2}{2}\\\sf y=3\cdot1\\\sf y=3\\\sf\dfrac{4}{x}=\dfrac{y}{15}\\\sf\dfrac{4}{x} =\dfrac{3}{15}\\\sf 3x=60\\\sf x=\dfrac{60}{3}\\\sf x=20\end{array}}$