Question

If the measure of one angle of a parallelogram is 60°. what are the measure of other angle
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Answer 1

Answer:

60°+x=180°

X=180°-60°=120

OR

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° [opp angles are equal]

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Answer 2

Answer:

we know that opposite angles are equal in parallelogram

let unknown angle be x

now

x+x+60°+60°=360° (angle sum property of quad.)

2x=240°

x=120°

1st angle = 120°

2nd angle= 60°

3rd angle =120°

4th angle = 60°