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Escherized Double Rotations
Author:
John Golden
Topic:
Rotation
Choose from 3, 4, 5, or 6-fold rotations. One of those doesn't work in general. Been looking at a lot of quilts lately, is all I can say. (Cf.
http://www.stitchedincolor.com/
)
GeoGebra
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Discover Topics
Matrices
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Mode
Incircle or Inscribed Circle