Question

Find the length of the side marked x​

Answer 1

19.77 cm

Explanation:

We'll use the pythagorean theorem

a^2 + b^2 = c^2

b^2 = c^2 - a^2

x^2 = 20^2 - 9^2

x^2 = 400 - 81

x^2 = 391

x = 19.77