What is the value of y in terms of x?

exams GRE GRE exam 0 Comments

In the figure, quadrilateral ABCD is inscribed in the circle and line segment AC is a diameter of the circle. The measure of angle BCD is v degrees, and the measure of angle BAD is v degrees.

What is the value of y in terms of x?
A . 2x
B . 90+x
C . 180 -x
D . 180-2x
E . 360-2x

Answer: C