Are adjacent angles in a parallelogram supplementary?

1 Answer
Noah G
Dec 26, 2015

Your are correct in that statement.

Explanation:

In a parallelogram, opposite angles have equal lengths, and so in each parallelogram there are two pairs of equal angles. In a parallelogram, the angles add up to 360˚. Since there are two pairs of angles and one of each pair is on each side, adjacent angles are supplementary (their sum makes 180˚)

The following diagram explains:

http://www.moomoomath.com/How-to-find-the-perimeter-of-a-parallelogram.html

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