The triangle below models a section of the supports you might see in a construction crane.

a. What is the sum of the angle measures of the triangle? Show your work.

1. Alt interior = 60

2. angle A + angle B + 2 =180

3. x supplemental

4. Alt interior = 90

5. Supplimentary = 90

(A is already solved)

b. Check your answer to problem 3a. Show your work.

(Please answer b)​