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| {{Infobox polyhedron | |||
| #REDIRECT] | |||
| |image=Prism 9.png | |||
| |type=] | |||
| |faces=2 ]s<br>9 ]s | |||
| |edges=27 | |||
| |vertices=18 | |||
| |coxeter={{CDD|node_1|9|node|2|node_1}} | |||
| |wythoff=<nowiki>2 9 | 2</nowiki> | |||
| |symmetry=''D<sub>9h</sub>'', , (*922), order 36 | |||
| |rotation_group=''D<sub>9</sub>'', <sup>+</sup>, (922), order 18 | |||
| |vertex_config=9.4.4 | |||
| |dual=Enneagonal dipyramid | |||
| |properties=] | |||
| |vertex_figure=Enneagonal prism vertfig.png | |||
| }} | |||
| In ], the '''enneagonal prism''' (or '''nonagonal prism''') is the seventh in an infinite set of ], formed by square sides and two regular ] caps. | |||
| If faces are all regular, it is a ]. | |||
| == Related polyhedra == | |||
| {{UniformPrisms}} | |||
| ] | |||
| {{Polyhedron-stub}} | |||
Revision as of 07:27, 17 November 2016
| Enneagonal prism | |
|---|---|
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| 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 | D9h, , (*922), order 36 |
| Rotation group | D9, , (922), order 18 |
| Dual polyhedron | Enneagonal dipyramid |
| Properties | convex semiregular |
| Vertex figure | |
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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
| Family of uniform n-gonal prisms | |||||||||||||
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| 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 |
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Plane tiling image | 
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| 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 |
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