SOLUTION: Given the coordinates of the vertices for parallelogram ABCD, how can you use the coordinates to show that ABCD is a rectangle?

Question 818385: Given the coordinates of the vertices for
parallelogram ABCD, how can you use the
coordinates to show that ABCD is a rectangle?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
show that the corners are right angles is the best
the lines should all be perpendicular.
show the slopes multiply to -1
Before you do that you might want to show that the opposite sides are equal length if it is easy to do.
If they aren't equal length then you are done
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