In Polyhedra and Plane Tilings
Each platonic solid and its dual have the same rectified polyhedron. (This is not true of polytopes in higher dimensions.)
The rectified polyhedron turns out to be expressible as the intersection of the original platonic solid with an appropriated scaled concentric version of its dual. For this reason, its name is a combination of the names of the original and the dual:
- The rectified tetrahedron, whose dual is the tetrahedron, is the tetratetrahedron, better known as the octahedron.
- The rectified octahedron, whose dual is the cube, is the cuboctahedron.
- The rectified icosahedron, whose dual is the dodecahedron, is the icosidodecahedron.
- A rectified square tiling is a square tiling.
- A rectified triangular tiling or hexagonal tiling is a trihexagonal tiling.
Examples
| Family | Parent | Rectification | Dual |
|---|---|---|---|
Tetrahedron |
Tetratetrahedron |
Tetrahedron |
|
Cube |
Cuboctahedron |
Octahedron |
|
Dodecahedron |
Icosidodecahedron |
Icosahedron |
|
Hexagonal tiling |
Trihexagonal tiling |
Triangular tiling |
|
Order-3 heptagonal tiling |
Triheptagonal tiling |
Order-7 triangular tiling |
|
Square tiling |
Square tiling |
Square tiling |
|
Order-4 pentagonal tiling |
tetrapentagonal tiling |
Order-5 square tiling |
Read more about this topic: Rectification (geometry)
Famous quotes containing the word plane:
“Even though I had let them choose their own socks since babyhood, I was only beginning to learn to trust their adult judgment.. . . I had a sensation very much like the moment in an airplane when you realize that even if you stop holding the plane up by gripping the arms of your seat until your knuckles show white, the plane will stay up by itself. . . . To detach myself from my children . . . I had to achieve a condition which might be called loving objectivity.”
—Anonymous Parent of Adult Children. Ourselves and Our Children, by Boston Women’s Health Book Collective, ch. 5 (1978)