Question

find the measure of all the angles of a parallelogram ABCD, if m <D=60°​

Answer 1

Answer:

Angle A= 120°

Angle B= 60°

Angle C= 120°

Angle D =60°

Step-by-step explanation:

m<D=60°

Therefore, m<B=60°.....opp. angles

Therefore, m<A=180°- 60°=120°... adjacent angles

Therefore, m<C= 120°.... opposite angle of angle A.

Answer 2

Answer:

We know that sum of Adjacent angles of parallelogram is 180°

∴ ∠A+∠D=180°

⟹∠A+60° =180°

∴∠A=180° −60° =120°