Question

find the missing side

Explanation:

Step1: Identify the theorem

Use the Pythagorean theorem $a^{2}+b^{2}=c^{2}$ for a right - triangle, where $a$ and $b$ are the legs and $c$ is the hypotenuse. Here $a = 4$, $b = 5$.

Step2: Substitute values

$c=\sqrt{4^{2}+5^{2}}=\sqrt{16 + 25}=\sqrt{41}\approx6.4$

Answer:

6.4