Geometry

quadrilateral A B C D on a graph. Point A is at ( -5, -1), Point B is at ( 6, 1), Point C is at (4, -3), Point D is at (-7, -5).
Prove the quadrilateral is a parallelogram by using Theorem 5-7; if the diagonals of a quadrilateral bisect each other, then it is a parallelogram. (Hint: Use the Midpoint formula.)

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asked by EKH
  1. well, what are the diagonals?
    AC and BD
    midpoint of AC = (-1/2,-2)
    midpoint of BD = (-1/2,-2)
    Looks like the diagonals bisect each other.

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    posted by Steve

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