Rectification (geometry) - in Polyhedra and Plane Tilings

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:

  1. The rectified tetrahedron, whose dual is the tetrahedron, is the tetratetrahedron, better known as the octahedron.
  2. The rectified octahedron, whose dual is the cube, is the cuboctahedron.
  3. The rectified icosahedron, whose dual is the dodecahedron, is the icosidodecahedron.
  4. A rectified square tiling is a square tiling.
  5. 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

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