An angle of a parallelogram is 20 degree less then its adjacent angle. Find the measure of its remaining angles.

Answer 1

Let adjacent angle = X degrees.
There are 4 angles; the opposite angles are equal.

x + (x-20) + x + (x-20) = 360o.
X = 100o, (x-20) = 80o.

Answer 2

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Answer 3

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