A parallelogram has sides A, B, C, and D. Sides A and B have a length of #5 # and sides C and D have a length of # 4 #. If the angle between sides A and C is #pi/2 #, what is the area of the parallelogram?

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Answer 1 · 2016-02-04T13:39:39

#Area"_(ABCD) = 20# sq. units

If an interior angle of a parallelogram is #pi/2# then the parallelogram is a rectangle.

The area of a rectangle is the product of two adjacent sides.

In this case #4xx5=20#