Johnson Solids (Page 4)

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(J63) Tridiminished Icosahedron

Vertices:   9  ({3 * 2}[3] + 3[4]) Faces: 8  ({3 + 1 * 2} equilateral triangles + 3 regular pentagons) Edges: 15 Symmetry:   3-fold Pyramidal  (C3v) (values below based on edge length = 1) Volume: (15+7*sqrt(5))/24     ≈1.277186493437438661453