Truncated dodecahedron

In geometry, the truncated dodecahedron is an Archimedean solid. It has 12 regular decagonal faces, 20 regular triangular faces, 60 vertices and 90 edges.

Truncated dodecahedron

(Click here for rotating model)
TypeArchimedean solid
Uniform polyhedron
ElementsF = 32, E = 90, V = 60 (χ = 2)
Faces by sides20{3}+12{10}
Conway notationtD
Schläfli symbolst{5,3}
t0,1{5,3}
Wythoff symbol2 3 | 5
Coxeter diagram
Symmetry groupIh, H3, [5,3], (*532), order 120
Rotation groupI, [5,3]+, (532), order 60
Dihedral angle10-10: 116.57°
3-10: 142.62°
ReferencesU26, C29, W10
PropertiesSemiregular convex

Colored faces

3.10.10
(Vertex figure)

Triakis icosahedron
(dual polyhedron)

Net
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