# How do you find the missing side of a right triangle if the legs are 4 and 9?

Jul 16, 2015

$c \approx 9.85$
hypotenuses: ${c}^{2} = {a}^{2} + {b}^{2}$
${c}^{2} = {4}^{2} + {9}^{2} = 16 + 81 = 97$
$c = \sqrt{97} \approx 9.85$