Geometric Model by A. Harry Wheeler, Polar Spherical Triangles

Description
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. One polar triangle is inside the other. 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 304723.213.
Location
Currently not on view
place made
United States: Massachusetts, Worcester
Physical Description
plastic (overall material)
Measurements
overall: 5.2 cm x 8.6 cm x 5.1 cm; 2 1/16 in x 3 3/8 in x 2 in
ID Number
1979.0102.212
accession number
1979.0102
catalog number
1979.0102.212
Credit Line
Gift of Louise D. Campbell
subject
Mathematics
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Trigonometry
Spherical Trigonometry
Data Source
National Museum of American History, Kenneth E. Behring Center

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