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Simillar with Geometry and You
Clouds Are Not Spheres
CircleSpeak
M. C. Escher: Journey to Infinity
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Four-Point Conics
About the Small Square and the Small Triangle
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Rotating Cubic Grid
Cubits
Map Projections
Perspectives
Cube
Here Come the 123s
Flatland
The Dot and the Line: A Romance in Lower Mathematics
From the Point to the Shape
Toroid
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Flatland
Penrose