Friday, 17 January 2014

How can I find out if ABCD is a parallelogram with the distance formula?

Question by Pickle Dude: How can I find out if ABCD is a parallelogram with the distance formula? A is (-5,-5) B is (-2,4) C is (6,4) D is (3,-5) Please use the distance formula to determine whether ABCD is a parallelogram or not. Please show me work so I can learn how to do this.

Best answer:

Answer by Josh K
All parallelograms have opposite sides equal. So simply show AB = CD AND BC = AD. If both of these are correct, you have a parallelogram. If not, you don't.

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