DescriptionIn geometry, the rhombicosidodecahedron, is an Archimedean solid, one of thirteen convex isogonal nonprismatic solids constructed of two or more types of regular polygon faces. It has 20 regular triangular faces, 30 square faces, 12 regular pentagonal faces, 60 vertices, and 120 edges. Wikipedia
Faces by sides: 20+30+12
Dihedral angle: 3-4: 159°05′41″ (159.09°); 4-5: 148°16′57″ (148.28°)
Symmetry group: Ih, H3,, (*532), order 120
Rotation group: I,+, (532), order 60
Properties: Semiregular convex
symbol: 3 5 | 2
References: U27, C30, W14
(sorry it’s so much reading)