Geometric Model by A. Harry Wheeler, Spherical Angle and Its Measure

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Description
The angle between two great circles on a sphere is defined to be equal to the angle between the lines tangent to the circles at their point of intersection. This cut and folded tan paper model of a sphere shows two intersecting great circles and tangents to them. It is among the models Wheeler dubbed collapsible.
A mark on the model reads: Spherical Angle (/) and its (/) Measure (/) A. Harry Wheeler (/) 1916. Another mark reads: A. Harry Wheeler (/) 1916.
Location
Currently not on view
date made
1916
associated dates
1916 00 00 / 1916 00 00
unspecified
Wheeler, Albert Harry
maker
Wheeler, Albert Harry
place made
United States: Massachusetts, Worcester
associated place
United States: Massachusetts, Worcester
Physical Description
paper (overall material)
tan (overall color)
cut and folded (overall production method/technique)
Measurements
average spatial: 10 cm x 10.7 cm x 10 cm; 3 15/16 in x 4 7/32 in x 3 15/16 in
ID Number
MA.304723.156
accession number
304723
catalog number
304723.156
Credit Line
Gift of Helen M. Wheeler
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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