Answer:
since it is a parallelogram, hence opposite angles will be equal to each other, hence ,
(5y - 3) = (3y + 27)
5y - 3y = 3 + 27
2y = 30
y = 15
measure of Angle A = 5y - 3 = (5 * 15) - 3 = 75 - 3 = 72 degree
measure of Angle B = 180 degree - 72 degree= 108 degree ( adjacent angle in parallelogram sum to 180 degree )
