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.
- T2-Separation Axiom
- Tableau
- Tabu Search
- Tacnode
- Tacpoint
- Tactix
- Tail Probability
- Tait Coloring
- Tait Cycle
- Tait Flyping Conjecture
- Tait's Hamiltonian Graph Conjecture
- Tait's Knot Conjectures
- Takagi Fractal Curve
- Take-Away Game
- Takeuchi Function
- TAK Function
- Talbot's Curve
- Talisman Hexagon
- Talisman Square
- Tame Algebra
- Tame Knot
- Tangency Theorem
- Tangent
- Tangent Bifurcation
- Tangent Bundle