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Question
In a parallelogram ABCD, write the sum of angles A and B.
Solution
In Parallelogram ABCD, ∠A and ∠Bare adjacent angles.
Thus, AB || DC
Then, we have ∠A and ∠B as consecutive interior angles which must be supplementary.
∠A + ∠B = 180°
Hence, the sum of ∠A and ∠B is 180°.
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