Question

fast pls guys!!!!!!!!!!!!!!!!!!!!​

Answer 1

Using Pythagorus Theorem,

${20}^{2} + {15}^{2} = {x}^{2}$

$400 + 225 = {x}^{2}$

$625 = {x}^{2}$

$x = \sqrt{625} = \boxed{25}$