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Wittenbauer's Parallelogram

© Copyright 2003, Jim Loy

With any quadrilateral, we trisect the sides, and draw a quadrilateral through the trisection points as shown below. This quadrilateral is a parallelogram. 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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