Truncated dodecahedron
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In geometry, the truncated dodecahedron is an Archimedean solid. It has 12 regular decagonal faces, 20 regular triangular faces, 60 vertices and 90 edges. Wikipedia
Conway notation: tD
Dihedral angle: 10-10: 116.57°; 3-10: 142.62°
Faces by sides: 20+12
Rotation group: I,+, (532), order 60
Symmetry group: Ih, H3,, (*532), order 120
Wythoff symbol: 2 3 | 5