Dodecagonal-pentagonal antiprismatic duoprism |
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Rank | 5 |
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Type | Uniform |
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Notation |
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Bowers style acronym | Twapap |
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Coxeter diagram | x12o s2s10o () |
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Elements |
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Tera | 12 pentagonal antiprismatic prisms, 10 triangular-dodecagonal duoprisms, 2 pentagonal-dodecagonal duoprisms |
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Cells | 120 triangular prisms, 24 pentagonal prisms, 12 pentagonal antiprisms, 10+10 dodecagonal prisms |
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Faces | 120 triangles, 120+120 squares, 24 pentagons, 10 dodecagons |
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Edges | 120+120+120 |
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Vertices | 120 |
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Vertex figure | Isosceles-trapezoidal scalene, edge lengths 1, 1, 1, (1+√5)/2 (base trapezoid), √2+√3 (top), √2 (side edges) |
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Measures (edge length 1) |
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Circumradius | |
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Hypervolume | |
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Diteral angles | Pappip–pap–pappip: 150° |
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| Titwadip–twip–titwadip: = |
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| Titwadip–twip–pitwadip: = |
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| Titwadip–trip–pappip: 90° |
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| Pitwadip–pip–pappip: 90° |
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Height | |
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Central density | 1 |
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Number of external pieces | 24 |
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Level of complexity | 40 |
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Related polytopes |
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Army | Twapap |
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Regiment | Twapap |
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Dual | Dodecagonal-pentagonal antitegmatic duotegum |
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Conjugates | Dodecagrammic-pentagonal antiprismatic duoprism, dodecagonal-pentagrammic retroprismatic duoprism, dodecagrammic-pentagrammic retroprismatic duoprism |
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Abstract & topological properties |
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Euler characteristic | 2 |
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Orientable | Yes |
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Properties |
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Symmetry | I2(12)×I2(10)×A1+, order 480 |
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Convex | Yes |
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Nature | Tame |
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The dodecagonal-pentagonal antiprismatic duoprism or twapap is a convex uniform duoprism that consists of 12 pentagonal antiprismatic prisms, 2 pentagonal-dodecagonal duoprisms, and 10 triangular-dodecagonal duoprisms. Each vertex joins 2 pentagonal antiprismatic prisms, 3 triangular-dodecagonal duoprisms, and 1 pentagonal-dodecagonal duoprism.
The vertices of a dodecagonal-pentagonal antiprismatic duoprism of edge length 1 are given by all central inversions of the last three coordinates of:
A dodecagonal-pentagonal antiprismatic duoprism has the following Coxeter diagrams:
- x12o s2s10o () (full symmetry; pentagonal antiprisms as alternated decagonal prisms)
- x12o s2s5s () (pentagonal antiprisms as alternated dipentagonal prisms)
- x6x s2s10o () (dodecagons as dihexagons)
- x6x s2s5s ()