Question

Helllp this is easy​

Answer 1

The third one 12 feet

Answer 2

Answer: 12 feet.

Explanation:

Use the Pythagorean theorem to solve:

`a^2 + b^2 = c^2\\5^2 + b^2 = 13^2\\25 + b^2 = 169\\b^2 = 144\\b = 12`

The third side length is 12.