Enneagonal prism

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Enneagonal prism
Prism 9.png
Type Uniform polyhedron
Faces 2 Enneagons
9 squares
Edges 27
Vertices 18
Vertex configuration 9.4.4
Wythoff symbol 2 9 | 2
Coxeter–Dynkin diagrams CDel node 1.pngCDel 9.pngCDel node.pngCDel 2.pngCDel node 1.png
Symmetry group D9h, [9,2], (*922), order 36
Rotation group D9, [9,2]+, (922), order 18
Dual polyhedron Enneagonal dipyramid
Properties convex semiregular
Vertex figure
Enneagonal prism vertfig.png

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[edit]

Family of uniform prisms
Symmetry 3 4 5 6 7 8 9 10 11 12
[2n,2]
[n,2]
[2n,2+]
CDel node 1.pngCDel 3.pngCDel node.pngCDel 2.pngCDel node 1.png CDel node 1.pngCDel 4.pngCDel node.pngCDel 2.pngCDel node 1.png
CDel node 1.pngCDel 2.pngCDel node 1.pngCDel 2.pngCDel node 1.png
CDel node 1.pngCDel 4.pngCDel node h.pngCDel 2.pngCDel node h.png
CDel node 1.pngCDel 5.pngCDel node.pngCDel 2.pngCDel node 1.png CDel node 1.pngCDel 6.pngCDel node.pngCDel 2.pngCDel node 1.png
CDel node 1.pngCDel 3.pngCDel node 1.pngCDel 2.pngCDel node 1.png
CDel node 1.pngCDel 6.pngCDel node h.pngCDel 2.pngCDel node h.png
CDel node 1.pngCDel 7.pngCDel node.pngCDel 2.pngCDel node 1.png CDel node 1.pngCDel 8.pngCDel node.pngCDel 2.pngCDel node 1.png
CDel node 1.pngCDel 4.pngCDel node 1.pngCDel 2.pngCDel node 1.png
CDel node 1.pngCDel 8.pngCDel node h.pngCDel 2.pngCDel node h.png
CDel node 1.pngCDel 9.pngCDel node.pngCDel 2.pngCDel node 1.png CDel node 1.pngCDel 10.pngCDel node.pngCDel 2.pngCDel node 1.png
CDel node 1.pngCDel 5.pngCDel node 1.pngCDel 2.pngCDel node 1.png
CDel node 1.pngCDel 10.pngCDel node h.pngCDel 2.pngCDel node h.png
CDel node 1.pngCDel 11.pngCDel node.pngCDel 2.pngCDel node 1.png CDel node 1.pngCDel 12.pngCDel node.pngCDel 2.pngCDel node 1.png
CDel node 1.pngCDel 6.pngCDel node 1.pngCDel 2.pngCDel node 1.png
CDel node 1.pngCDel 12.pngCDel node h.pngCDel 2.pngCDel node h.png
Image Triangular prism.png Tetragonal prism.png
Uniform polyhedron 222-t012.png
Cube rotorotational symmetry.png
Pentagonal prism.png Hexagonal prism.png
Truncated triangle prism.png
Cantic snub hexagonal hosohedron.png
Prism 7.png Octagonal prism.png
Truncated square prism.png
Cantic snub octagonal hosohedron.png
Prism 9.png Decagonal prism.png Hendecagonal prism.png Dodecagonal prism.png
As spherical polyhedra
Image Spherical triangular prism.png Spherical square prism.png
Spherical square prism2.png
Spherical pentagonal prism.png Spherical hexagonal prism.png
Spherical hexagonal prism2.png
Spherical heptagonal prism.png Spherical octagonal prism.png
Spherical octagonal prism2.png
Spherical decagonal prism.png
Spherical decagonal prism2.png