Question

The measure of b is the pic below.

Answer 1

b = 21

In this problem, we aren't finding the hypotenuse, but a side...

Using Pythagoras' theorem

side² = hyp² – side²

b² = 29² – 20²

b² = 841 – 400

b² = 441

b² = √441

b = 21

Therefore b = 21