Answer:
Angle AOB= 180 degrees
Angle ZOB = 63 degrees
Angle XOY= 65 degrees
Angle AOY= 84 degrees
Angle YOZ= 33 degrees
Explanation:
Angle AOB =180 degrees because angles on a straight line =180
Angle AOY= 84 because AOY = a+b = 19+65
Angle YOZ= 180-19-65-63= 33 because angles on a straight line =180