Question

One angle of a parallelogram is 60 degree then find the measure of all the remaining angle.

Answer 1

Hey Mate,,, I think this might help you!!!!

In the figure :

ABCD is a parallelogram.

∠DAB = 60°

In a parallelogram , opposite angles are equal .

∴∠DAB =∠DCB =60°

Also , in a parallelogram , adjacent angles are supplementary.

∠DAB + ∠ABC = 180°

∠ABC = 180° - 60°

= 120°

∠ABC = ∠ADC =120° [opposite angles are equal]

Answer 2

Angle A=60degree

Then angle C=60degree opposite angles of a parallelogram are equal angle B =120 degree sum of adj angles of llgm is 180

Then, AngleD=120degree