Great ditrigonal icosidodecahedron
| Great ditrigonal icosidodecahedron | |
|---|---|
| File:Great ditrigonal icosidodecahedron.png | |
| Type | Uniform star polyhedron |
| Elements | F = 32, E = 60 V = 20 (χ = −8) |
| Faces by sides | 20{3}+12{5} |
| Coxeter diagram | Template:CDD |
| Wythoff symbol | 3 5 3 | 3/2 5 3 | 3 5/4 3/2 | 3/2 5/4 |
| Symmetry group | Ih, [5,3], *532 |
| Index references | U47, C61, W87 |
| Dual polyhedron | Great triambic icosahedron |
| Vertex figure | File:Great ditrigonal icosidodecahedron vertfig.png ((3.5)3)/2 |
| Bowers acronym | Gidtid |
In geometry, the great ditrigonal icosidodecahedron (or great ditrigonary icosidodecahedron) is a nonconvex uniform polyhedron, indexed as U47. It has 32 faces (20 triangles and 12 pentagons), 60 edges, and 20 vertices.[1] It has 4 Schwarz triangle equivalent constructions, for example Wythoff symbol 3 | 3 <templatestyles src="Fraction/styles.css" />5⁄4 gives Coxeter diagram Template:CDD = Template:CDD. It has extended Schläfli symbol a{<templatestyles src="Fraction/styles.css" />5⁄2,3} or c{3,<templatestyles src="Fraction/styles.css" />5⁄2}, as an altered great stellated dodecahedron or converted great icosahedron.
Its circumradius is times the length of its edge,[2] a value it shares with the cube.
Related polyhedra
Its convex hull is a regular dodecahedron. It additionally shares its edge arrangement with the small ditrigonal icosidodecahedron (having the triangular faces in common), the ditrigonal dodecadodecahedron (having the pentagonal faces in common), and the regular compound of five cubes.
