Type Uniform polyhedron Edges 36 Vertex configuration /2.3.3.3 | Faces 2 {9/2}
18 {3} Vertices 18 Wythoff symbol |2 2 9/2 | |
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In geometry, anenneagrammic antiprism is a star antiprism constructed by enneagrammic bases. There are two forms, built on the two enneagrams {9/2} and {9/4}, and one crossed form {9/5}.
Contents
A nonuniform 9/7 cross-antiprism can be constructed without equal edge-lengths.
A 9/3 ratio is reducible and so represents a compound polyhedron of 3 triangular antiprisms with 120 degree rotations between them.
9/2
The first solution is a 9/2 antiprism.
9/4
9/4-antiprism
9/5
9/5-antiprism
References
Enneagrammic antiprism Wikipedia(Text) CC BY-SA