Versi-Quasi-Regular Polyhedra

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(Uniform #63) Great Dodecicosahedron
Vertices:  60  (60[4])
Faces:32  (20 regular hexagons + 12 regular decagrams)
Edges:120
Symmetry:  Full Icosahedral  (Ih)
Dihedral Angle 1 (60):  acos(sqrt(15*(5+2*sqrt(5)))/15)    ≈37.377368141 degrees
Dihedral Angle 2 (60):  acos(−sqrt(15*(5−2*sqrt(5)))/15)    ≈100.812316964 degrees
Dual Solid:  Great Dodecicosacron
(values below based on edge length = 1)
Circumscribed Radius:  sqrt(2*(17−3*sqrt(5)))/4    ≈1.1342285961998925302
Midscribed Radius:  sqrt(6*(5−sqrt(5)))/4    ≈1.0180739209102543669
Hexagon Center Radius:  sqrt(6*(3−sqrt(5)))/4    ≈0.53523313465963489791
Decagram Center Radius:  sqrt(2*(5+sqrt(5)))/4    ≈0.95105651629515357212


References:[1]Jean Paul Albert Badoureau, Mémoire sur les Figures Isocèles,
Journal de l'École polytechnique 49 (1881), 47-172.