Answer:
B and D = 60
A and C = 120
Step-by-step explanation:
Let angle A = angle C = 2x degrees.
Then angle B = angle D = x degrees.
Sum of the angles of a parallelogram must equal 360 degrees, so
angle A + angle B + angle C + angle D = 360 degrees
thus 2x+x+2x+x = 360
, so 6x=360
x=60 degrees so angles B and D are 60 degrees.
2x = 120 degrees so angles A and C are 120 degrees.
