Midpoint Rotation. Start with any tiling using quadrilaterals or triangles. (Note: we can tile a plane with any of these.)Pick a side and find its midpoint.Given any shape on one side of the midpoint, rotate it through 180 degrees to form the other side.. Escher Example. Side Rotation. Start with any regular tiling.Cut out a shape on one side, rotate it to an adjacent side using the endpoint..
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