Question

Nesta figura tem-se r//s//t. Calcule x.

Answer 1

Utilizando o teorema de Tales, podemos achar a relação:

$\frac{6,5}{x}~=~\frac{7}{9,6}\\\\\\Multiplicando~Cruzado\\\\\\7~.~x~=~6,5~.~9,6\\\\\\7x~=~62,4\\\\\\\boxed{x~=~\frac{62,4}{7}\,cm~~ou~~\approx 8,91\,cm}$