National Museum of American History
Polyhedron Model by Martin Berman, Gyroelongated Square Cupola
Berman, Martin · 1970
The base of this model is a regular octagon, the top a square. Above the octagon is a round of sixteen equilateral triangles, alternating in orientation. Above the triangles is a round of four squares and four triangles. The model has a total of twenty equilateral triangles, four squares, and one regular octagon.
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