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Varignon's Theorem

© Copyright 2003, Jim Loy

If we draw line segments between the midpoints, in order, of any quadrilateral, we get a parallelogram which has half the area of the original quadrilateral (if it was convex). Move the red dots.

Please enable Java for an interactive construction (with Cinderella).

The above Java interactive demonstration was created with Cinderella (a geometry program).


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