Geometric Model by A. Harry Wheeler, Polar Spherical Triangles (incomplete)

Geometric Model by A. Harry Wheeler, Polar Spherical Triangles (incomplete)

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This cut and glued clear plastic model is one of several in which A. Harry Wheeler illustrated properties of polar spherical triangles. A sticker on it reads: PT. An inner polar triangle and one arc of an outer one survives – two faces are missing. The vertices are unlabeled. The model is undated and has no Wheeler number.
For a discussion of polar triangles, see 304723.159. Compare 304723.491, 304723.516, 304723.521, and 1979.0102.212.
Currently not on view
Object Name
Geometric Model
Wheeler, Albert Harry
place made
United States: Massachusetts, Worcester
Physical Description
plastic (overall material)
overall: 5.2 cm x 8.3 cm x 5.2 cm; 2 1/16 in x 3 9/32 in x 2 1/16 in
ID Number
accession number
catalog number
Credit Line
Gift of Louise D. Campbell
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Spherical Trigonometry
Data Source
National Museum of American History
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