Polyhedron Model by Martin Berman, Elongated Triangular Pyramid

The model has three squares faces around a triangular base. Three equilateral triangles rise from the other end to meet at a vertex. Hence the total number of faces is four equilateral triangles and three squares.
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: 9.8 cm x 5.2 cm x 4.8 cm; 3 27/32 in x 2 1/16 in x 1 7/8 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

Visitor Comments

Add a comment about this object

**Please read before submitting the form**

Have a comment or question about this object to share with the community? Please use the form below. Selected comments will appear on this page and may receive a museum response (but we can't promise). Please note that we generally cannot answer questions about the history, rarity, or value of your personal artifacts.

Have a question about anything else, or would you prefer a personal response? Please visit our FAQ or contact page.

Personal information will not be shared or result in unsolicited e-mail. See our privacy policy.

Enter the characters shown in the image.