“Truncated rhombicuboctahedron”的意思、由来-开放百科全书

词条

Truncated rhombicuboctahedron

释义

Other names
Zonohedron
Excavated truncated rhombicuboctahedron
Related polyhedra
See also
References
External links

Truncated rhombicuboctahedron

Schläfli symbol	trr{4,3} =
Conway notation	taaC
Faces	50: 24 {4} 8 {6} 6+12 {8}
Edges	144
Vertices	96
Symmetry group	O_h, [4,3], (*432) order 48
Rotation group	O, [4,3]⁺, (432), order 24
Dual polyhedron	Disdyakis icositetrahedron
Properties	convex, zonohedron

The truncated rhombicuboctahedron is a polyhedron, constructed as a truncated rhombicuboctahedron. It has 50 faces, 18 octagons, 8 hexagons, and 24 squares.

It can fill space with the truncated cube, truncated tetrahedron and triangular prism as a truncated runcic cubic honeycomb.

Other names

Truncated small rhombicuboctahedron
Beveled cuboctahedron

Zonohedron

As a zonohedron, it can be constructed with all but 12 octagons as regular polygons. It has two sets of 48 vertices existing on two distances from its center.

It represents the Minkowski sum of a cube, a truncated octahedron, and a rhombic dodecahedron.

Excavated truncated rhombicuboctahedron

Excavated truncated rhombicuboctahedron
Faces	148: 8 {3} 24+96+6 {4} 8 {6} 6 {8}
Edges	312
Vertices	144
Euler characteristic	-20
Genus	11
Symmetry group	O_h, [4,3], (*432) order 48

The excavated truncated rhombicuboctahedron is a toroidal polyhedron, constructed from a truncated rhombicuboctahedron with its 12 irregular octagonal faces removed. It comprises a network of 6 square cupolae, 8 triangular cupolae, and 24 triangular prisms. ^[1] It has 148 faces (8 triangles, 126 squares, 8 hexagons, and 6 octagons), 312 edges, and 144 vertices. With Euler characteristic χ = f + v - e = -20, its genus (g = (2-χ)/2) is 11.

Without the triangular prisms, the toroidal polyhedron becomes a truncated cuboctahedron.

Excavated
Truncated rhombicuboctahedron	Truncated cuboctahedron

Related polyhedra

The truncated cuboctahedron is similar, with all regular faces, and 4.6.8 vertex figure.

The triangle and squares of the rhombicuboctahedron can be independently rectified or truncated, creating four permutations of polyhedra. The partially truncated forms can be seen as edge contractions of the truncated form.

The truncated rhombicuboctahedron can be seen in sequence of rectification and truncation operations from the cuboctahedron. A further alternation step leads to the snub rhombicuboctahedron.

related polyhedra
Name	r{4,3	rr{4,3	tr{4,3	Rectified rrr{4,3	Partially truncated		Truncated trr{4,3	srCO
Conway	[https://levskaya.github.io/polyhedronisme/?recipe=aC aC]	[https://levskaya.github.io/polyhedronisme/?recipe=aaC aaC=eC]	[https://levskaya.github.io/polyhedronisme/?recipe=taC taC=bC]	[https://levskaya.github.io/polyhedronisme/?recipe=eaC aaaC=eaC]	dXC	dXdC	[https://levskaya.github.io/polyhedronisme/?recipe=baC taaC=baC]	[https://levskaya.github.io/polyhedronisme/?recipe=saC saC]
Image
VertFigs	3.4.3.4	3.4.4.4	4.6.8	4.4.4.4_d and 3.4.4_d.4	4.4.4.6_i and 4.6.6_i	4.6_i.8 and 3.4.6_i.4	4.8.8_p and 4.6.8_p	3.3.3.3.4 and 3.3.4.3.4

References

1. ^http://www.doskey.com/polyhedra/PrismExpansions.html

{{cite journal

| author = Eppstein, David
| authorlink = David Eppstein
| year = 1996
| title = Zonohedra and zonotopes
| journal = Mathematica in Education and Research
| volume = 5
| issue = 4
| pages = 15–21
| url = http://www.ics.uci.edu/~eppstein/junkyard/ukraine/ukraine.html}}

Coxeter Regular Polytopes, Third edition, (1973), Dover edition, {{ISBN|0-486-61480-8}} (pp. 145–154 Chapter 8: Truncation)
John H. Conway, Heidi Burgiel, Chaim Goodman-Strauss, The Symmetries of Things 2008, {{ISBN|978-1-56881-220-5}}

External links

George Hart's Conway interpreter: generates polyhedra in VRML, taking Conway notation as input
Prism Expansions Toroid model

1 : Polyhedra

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