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Trapezoid Reptiling

A tool to divide up a quadrilateral into 4 subquadrilaterals. If the starting trapezoid is a pattern block trapezoid (congruent to 3 equilateral triangles), then the subdivision is a reptile into similar trapezoids. Make some art! Mine, and the image that inspired this, is at http://mathhombre.tumblr.com/post/50674144422/saw-this-great-image-at-peanos-from-elijah