Question

1. Find the measure of

Answer 1

b = 39°

Explanation:

The box means that it is a right angle and a right angle means it is 90 degrees.

90 degrees - 51 degrees = 39 degrees

b = 39°

Answer 2

39 degrees

Explanation:

It is shown that there is a 90 degree angle one part is given so 90-51=39 degrees.