Question

No triangulo da figura a seguir BC//DE. Determine o valor de x e dos lados AB E AC nos triangulos ABC
Teorema de Tales, preciso urgente​

Answer 1

$\bf \boxed{\begin{array}{ccc} \bf \dfrac{AB }{ AD } = \dfrac{AC }{AD } \\ \\ \bf\dfrac{15}{10} = \dfrac{x}{5} \\ \\ \bf 5 \times 15 = 10x \\\\ \bf 75=10x \\\\ \bf \dfrac{75}{10} = x \\ \\ \bf \boxed{ \bf 7,5=x} \Longrightarrow Resposta\checkmark \end{array}}$