National Museum of American History
Polyhedron Model by Martin Berman, Gyroelongated Pentagonal Cupola
Berman, Martin · 1970
The bottom of this model is a regular decagon, the top a regular pentagon. Above the decagon are twenty triangular faces. Above these are five squares which alternate with five triangles. Hence the faces are twenty-five equilateral triangles, five squares, one regular pentagon, and one regular decagonal.
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