Geometric Model by A. Harry Wheeler, Two Planes Perpendicular to a Third Plane

Geometric Model by A. Harry Wheeler, Two Planes Perpendicular to a Third Plane

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To show relationships among planes and angles, A. H. Wheeler designed a series of what he called platform models. All of these had a rectangular base or platform, with other segments (often other rectangles) secured to it. These other pieces sometimes penetrated the platform.
This tan paper platform model has a cream-colored base penetrated by two rectangles that intersect in a line perpendicular to the platform. Holles in the platform allow the rectangles to rotate about their line of intersection. A mark on the underside of the platform reads: Two Planes (/) Perpendicular to a Third Plane (/) A. Harry Wheeler (/) 1911.
George A. Wentworth, Plane and Solid Geometry, Boston: Ginn, 1899, p. 276.
Currently not on view
Object Name
Geometric Model
date made
Wheeler, Albert Harry
place made
United States: Massachusetts, Worcester
Physical Description
paper (overall material)
overall: 7.2 cm x 11.5 cm x 7 cm; 2 27/32 in x 4 17/32 in x 2 3/4 in
ID Number
catalog number
accession number
Credit Line
Gift of Louise D. Campbell
See more items in
Medicine and Science: Mathematics
Data Source
National Museum of American History
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