Question 2 of 10 What is the measure of ZXYZ?
X
17
O A. 17
V
O B. 72
55
C. 55°
D. 36

Angle subtended by an arc at the centre is twice of the angle subtended at any point on the circle . And in the given diagram, angle subtended on the circle by arc XZ=60 degree . So arc XZ =2*60=120. Therefore measurement of arc xyz=360-120=240 degree.

it has to be a.