Question

Determine a diagonal de um quadrado de lado igual a 5cm.

Answer 1

d=l√2
d=5√2
.......................................

Answer 2

$d^{2}$ =$5^{2}$ +$5^{2}$
$d^{2}$ = 25 + 25
$d^{2}$ =50
  d = $\sqrt{50}$
 d = 5$\sqrt{2}$