Question

In a parallelogram ABCD ,the measure of angle B is 120 degree. The measure of angle C is_____ ?
plz help me :(

Answer 1

Answer:

Angle B + Angle C =180° (adjacent angle)

120°+Angle C=180°

Angle C=180°-120°=60°

Therefore, Angle C=60°

Answer 2

Answer:

60°

Step-by-step explanation:

the adjacent angles of a parallelogram are supplementary which means that the sum of there angles is 180°.

Let angle C be x.

angle B + angle C = 180°

120° + x = 180°

x = 180° - 120°

x = 60°