Question

Calcule as medidas das incógnitas das seguintes figuras

Answer 1

$\large\boxed{\begin{array}{l}\rm a)~\sf x^2+3^2=5^2\\\sf x^2+9=25\\\sf x^2=25-9\\\sf x^2=16\\\sf x=\sqrt{16}\\\sf x=4\\\rm b)~\sf x^2+8^2=17^2\\\sf x^2+64=289\\\sf x^2=289-64\\\sf x^2=225\\\sf x=\sqrt{225}\\\sf x=15\end{array}}$