Polyhedron Model by Martin Berman, Pentagonal Orthobirotunda

The top and bottom faces of this model are regular pentagons. Ten additional regular pentagons and twenty equilateral triangles form the sides. Hence in total the faces are are twelve pentagons and twenty triangles.
On Berman's models of regular-faced convex polyhedra, see 1978.1065.01.
Currently not on view
Object Name
geometric model
date made
Berman, Martin
Physical Description
paper (overall material)
overall: 15.5 cm x 19 cm x 19 cm; 6 3/32 in x 7 15/32 in x 7 15/32 in
place made
United States: Pennsylvania, Pittsburgh
ID Number
accession number
catalog number
Regular-Faced Convex Polyhedra
Berman Models
Science & Mathematics
See more items in
Medicine and Science: Mathematics
Berman Models
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Gift of Martin Berman
Additional Media

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