Answer:
Step-by-step explanation:
A parallelogram has two sets containing 2 equal angles each. The question has chosen one angle from each group (they are consecutive angles).
Let the smaller angle = x
Let the larger angle = 3x + 40
Together they add to 180 (that's a property of a parallelogram)
x + 3x + 40 = 180 Subtract 40 from each side. Combine the left
4x +40-40 = 180-40 Combine
4x = 140 Divide by 4
x = 140/4
x = 35
So the smaller angle is 35
The larger angle is 3*35 + 40
The larger angle is 145
