# Tetrahedral symmetry

(Redirected from A3)

Tetrahedral symmetry | |
---|---|

Rank | 3 |

Space | Spherical |

Order | 24 |

Info | |

Coxeter diagram | |

Elements | |

Axes | 3 × (BC_{2}×A_{1})/2, 4 × A_{2}×I |

Related polytopes | |

Omnitruncate | Great rhombitetratetrahedron |

**Tetrahedral symmetry**, also known as **tettic symmetry** and notated **A _{3}**, is a 3D spherical Coxeter group. It is the symmetry group of the regular tetrahedron.

## Subgroups[edit | edit source]

- Chiral tetrahedral symmetry (maximal)
- Triangular pyramidal symmetry (maximal)
- Chiral triangular pyramidal symmetry
- Digonal antiprismatic symmetry (maximal)
- Prodigonal antiprismatic symmetry
- Chiral digonal prismatic symmetry
- Rectangular pyramidal symmetry
- Chiral digonal pyramidal symmetry
- Reflection symmetry
- Identity symmetry

## Convex polytopes with A_{3} symmetry[edit | edit source]

- Tetrahedron (regular)
- Tetratetrahedron (isogonal)/Rhombic hexahedron (isotopic)
- Truncated tetrahedron (isogonal)/Triakis tetrahedron (isotopic)
- Rhombitetratetrahedron (isogonal)/Deltoidal dodecahedron (isotopic)
- Great rhombitetratetrahedron (isogonal)/Disdyakis hexahedron (isotopic)