Radius AZ is a perpendicular bisector of chord XR. What is the measure of <XAR?
100°
90°
80°
40°

Answer:
the answer is 80,
Step-by-step explanation:
because AX =AR (the radii of the same circle) hence it is an isosceles triangle then the opposite angles would be equal, therefore angle X =angle R. So, 50 +50 is 100 and 180 -100 is 80(angle sum property)