Question

Find the length of the third side. If necessary, round to the nearest tenth.

13
20
help please !

Answer 1

Answer: D, 15.2

Explanation:

use formula a^2 + b^2 = c^2

a^2 + 13^2 = 20^2

a^2 + 169 = 400

- 169 -169

a^2 = 231

sqrt sqrt

a = sqrt(231)

a = 15.198 = 15.2