Question

What is the length of the unknown side of the right triangle?

A. 21
B. 29
C. 400
D. 441

Answer 1

29

Explanation:

a^2 + b^2 = c^2

21^2 + 20^2 =c^2

441+400 =
`√(841) = 29`

Answer 2

The answer is B. 29. You use Pythagorean theorem to figure this out.
20^2 + 21^2 = 29^2