Answer and Explanation
Your Answer is
Correct Answer is C
Explanation
Because ∠wcy + ∠xcz = ∠wcx + ∠ycz + 2∠xcy=∠wcz + ∠xcy=150° + ∠xcy, and ∠wcy + ∠xcz =180°, so ∠xcy=30°
19. A circle with center C is shown below. Points W, X, Y, and Z lie on the circle. The measure of∠WCY is 100°, the measure of ∠XCZ is 80°, and the measure of ∠WCZ is 150°. What is the measure of ∠XCY ?
