how do you measure 4 interior angles

Parallelogram

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You only need to measure one interior angle. For example, if you measure D, then B=D and A=C=180-D.

Other ways are to calculate the angles from side lengths or the height.

Area of ABCD is base*height=DC*height or AD*DCsinD, so sinD=Area/(AD*DC).
by Top Rated User (1.1m points)

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