Great Dirhombicosidodecahedron
The Uniform Polyhedron 
whose Dual is the Great Dirhombicosidodecacron. ThisPolyhedron is exceptional because it cannot be derived from Schwarz Triangles and because itis the only Uniform Polyhedron with more than six Polygons surrounding each Vertex (four Squares alternating with two Triangles and twoPentagrams). It has Wythoff Symbol 
. Its faces are
, and its Circumradius for unit edge length is
References
Wenninger, M. J. Polyhedron Models. Cambridge, England: Cambridge University Press, pp. 200-203, 1989.
- Hindu Check
- Hinge
- Hippias' Quadratrix
- Hippopede
- Hi-Q
- Histogram
- Hitch
- Hitting Set
- Hjelmslev's Theorem
- HJLS Algorithm
- HK Integral
- Hodge Star
- Hodge's Theorem
- Hoehn's Theorem
- Hoffman-Singleton Graph
- Hoffman's Minimal Surface
- Hofstadter-Conway $10,000 Sequence
- Hofstadter Figure-Figure Sequence
- Hofstadter G-Sequence
- Hofstadter H-Sequence
- Hofstadter Male-Female Sequences
- Hofstadter Point
- Hofstadter Sequences
- Hofstadter's Q-Sequence
- Hofstadter Triangle