Geometric Model by A. Harry Wheeler, Polar Spherical Triangles
date: label: date made
content: 1920 04 06
name: label: maker
content: Wheeler, Albert Harry
notes: label: Description
content: This cut and folded tan paper model is one of several in which A. Harry Wheeler illustrated properties of polar spherical triangles. A sticker on it reads: PTb<sup>*</sup>. One polar triangle is inside the other. The vertices of the outer triangle are labeled A, B, and C. The vertices of the inner triangle are labeled A<sub>2</sub>, B<sub>2</sub>, and C<sub>2</sub>. The model has no Wheeler number. It also is marked: See STRIA(1)<sup>2</sup>
label: Description
content: For a discussion of polar triangles, see MA.304723.159.
label: Location
content: Currently not on view
place: label: place made
content: United States: Massachusetts, Worcester
topic: label: Subject
content: Mathematics
setName: label: See more items in
content: Medicine and Science: Mathematics
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content: Trigonometry
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content: Science & Mathematics
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content: Spherical Trigonometry
creditLine: label: Credit Line
content: Gift of Helen M. Wheeler
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MA.304723.666
label: accession number
content: 304723
label: catalog number
content: 304723.666
objectType: label: Object Name
content: Geometric Model
physicalDescription: label: Physical Description
content: paper (overall material)
label: Physical Description
content: tan (overall color)
label: Physical Description
content: cut and folded (overall production method/technique)
label: Measurements
content: average spatial: 5.5 cm x 9.5 cm x 8 cm; 2 5/32 in x 3 3/4 in x 3 5/32 in