Enneagonal prism | |
---|---|

Type | Uniform polyhedron |

Faces | 2 Enneagons 9 squares |

Edges | 27 |

Vertices | 18 |

Vertex configuration | 9.4.4 |

Wythoff symbol | 2 9 | 2 |

Coxeter diagram | |

Symmetry group | D, [9,2], (*922), order 36_{9h} |

Rotation group | D, [9,2]_{9}^{+}, (922), order 18 |

Dual polyhedron | Enneagonal dipyramid |

Properties | convex semiregular |

Vertex figure | |

In geometry, the **enneagonal prism** (or **nonagonal prism**) is the seventh in an infinite set of prisms, formed by square sides and two regular enneagon caps.

If faces are all regular, it is a semiregular polyhedron.

## Related polyhedra

Prism name | Digonal prism | (Trigonal) Triangular prism |
(Tetragonal) Square prism |
Pentagonal prism | Hexagonal prism | Heptagonal prism | Octagonal prism | Enneagonal prism | Decagonal prism | Hendecagonal prism | Dodecagonal prism | ... | Apeirogonal prism |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|

Polyhedron image | ... | ||||||||||||

Spherical tiling image | Plane tiling image | ||||||||||||

Vertex config. | 2.4.4 | 3.4.4 | 4.4.4 | 5.4.4 | 6.4.4 | 7.4.4 | 8.4.4 | 9.4.4 | 10.4.4 | 11.4.4 | 12.4.4 | ... | ∞.4.4 |

Coxeter diagram | ... |