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Geometric Model by A. Harry Wheeler, Equilateral Triangle Transformable into Square, Plane Dissection

Geometric Model by A. Harry Wheeler, Equilateral Triangle Transformable into Square, Plane Dissection

Usage conditions apply
The four plastic pieces fit in metal container with cloth-lined lid. The pieces may be arranged as a square or an equilateral triangle. Compare MA.304723.764, MA.304723.819, MA.304723.766, and MA.304723.823. This small version of the model has no hinges.
This is similar but not identical to Wheeler's Model 4ST. Two drawings for that puzzle, both dated January 17, 1932 and April 26, 1932, are in 1979.3002.43, folder 1. The drawings refer to the Mathematical Gazette - no volume or page is given. A drawing in 1979.3002.53 dated January 5, 1932 refers to this model as 4C.
Currently not on view
Object Name
geometric model
date made
ca 1932
ca 1932 04 26
Wheeler, Albert Harry
Wheeler, Albert Harry
place made
United States: Massachusetts, Worcester
associated place
United States: Massachusetts, Worcester
Physical Description
plastic (overall material)
metal (overall material)
cloth (overall material)
green (overall color)
cut (overall production method/technique)
average spatial:.7 cm x 4.7 cm x 3.5 cm; 9/32 in x 1 27/32 in x 1 3/8 in
ID Number
accession number
catalog number
Credit Line
Gift of Helen M. Wheeler
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Data Source
National Museum of American History
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