Question

tf one of the angles of a parallelogram is 60 than value of opposite angle ar?
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Answer 1

Answer:

hope this is helpful

Step-by-step explanation:

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]

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