Question 15
In the diagram, PQRS represents a rectangular piece of paper. The paper is folded along a line VW so that ∠VWQ = 125°. When the folded paper is flattened, points R and Q have moved to points R′ and Q′, respectively, and R′V crosses PW at Y. What is the measure of ∠PYV?
**Editorial note for this self-study exercise:** The fold is an exact reflection across VW. P, Y, W, Q lie on the original top side in that order, and S, V, R on the bottom side. Enter the angle in degrees as a number, without the degree sign.
**Editorial note for this self-study exercise:** The fold is an exact reflection across VW. P, Y, W, Q lie on the original top side in that order, and S, V, R on the bottom side. Enter the angle in degrees as a number, without the degree sign.