Question

Hipotenuza=20, cateto b=X, cateto c=12

Answer 1

Teorema de Pitágoras=
${a}^{2} = {b }^{2} + c {}^{2}$
sendo A igual a hipotenusa e B(x) e C os catetos
${20}^{2} = {x}^{2} + {12}^{2}$
$400 = {x}^{2} + 144$
$400 - 144 = x {}^{2}$

$256 = {x}^{2}$
$\sqrt{256} = x$
$x = 16$