Incredible Art Department
The Incredible Art Department: Art Tessellations
Looks at tessellation artists, including M.C. Escher, Robert Fathauer, and Roger Penrose. This is followed by a discussion of fractals and their similarities and differences to tessellations, and links to lessons and resources on...
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Tessellation World of Makoto Nakamura
There's more to do here than just look at Escher-like tessellations. You can watch animated tessellations and put together puzzles.