Part A: Find the value of x. A. x = 0
B. x = 10
C. x = 20
D. x = 40

Part B: Find the measure of each labeled angle in the previous question.

A. Both of the angles measure 0°.
B. One of the angles measures 50°, and the other angle measures 40°.
C. One of the angles measures 100°, and the other angle measures 80°.
D. One of the angles measures 200°, and the other angle measures 160°.