1-1-1M-1M
Mirror alternate rows. Shape 8 Shape 9
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1-1-4-4
Rotate alternate rows 270 degrees clockwise. Shape 6 Shape 7
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1-1-3-3
Rotate alternate rows 180 degrees. Shape 4 Shape 5
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1-1-2-2
Rotate alternate rows 90 degrees clockwise. Shape 2 Shape 3
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1-1-1-1
This is the first pattern in the Library. All other patterns derive from this one. This is the only single-shape tessellation in the Library. One shape fits against itself to fill the plane perfectly. Shape 1
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How to Read the Library
There is only one book in this library — Beyond Symmetry, by Raymond K. Houston. It can never be published for two reasons: there are too many pages to feasibly print and bind, and more pages are being added all the time. So the book lives here, the only place in the world where it…
