|Faces||14 triangles, 7 heptagrams, 1 great heptagram|
|Abstract & topological properties|
|Symmetry||I2(7)×I, order 14|
The great supersemicupola is the first known example of a 7/2-7/2-3 acrohedron, i.e. a polyhedron with all regular faces that has two heptagrams and a triangle meeting at a vertex. It was discovered by Mason Green in 2005 along with the 7-7-3 small supersemicupola. Most acrons containing heptagons have no known acrohedron, so the existence of this acrohedron is rather unusual.
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- Jim McNeill. "7-7-3."