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Visualizing Mathematics with 3D Printing
Chapters
1. Symmetry
2. Polyhedra
3. Four-dimensional space
4. Tilings and curvature
5. Knots
6. Surfaces
7. Menagerie
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4.18
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Regular octahedra and tetrahedra can together tile space, in a ratio of 1 to 2.
Thingiverse
http://www.thingiverse.com/thing:1608569
Figure files
octahedra_and_tetrahedra.obj.zip
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