Geometric Model by A. Harry Wheeler, Line Perpendicular to Two Lines

Geometric Model by A. Harry Wheeler, Line Perpendicular to Two Lines

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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 platform, with other segments (often other rectangles) secured to it. This tan paper platform model shows the intersection of four planes. One serves as the platform and the other three intersect in a line perpendicular to the platform. The third plane (which is represented by a triangle between two other triangles) is movable. The line at the base of this central triangle is perpendicular to the line joining the two upper triangles and, when moved to intersect the line drawn on the base, perpendicular to that line. Hence a line perpendicular to two llines.
Compare MA.304723.650,1979.0102.183,1979.0102.265,1979.0102.266, and 1979.0102.267.
For a related pattern, see 1979.3002.109.
Currently not on view
Object Name
Geometric Model
date made
ca 1945
Wheeler, Albert Harry
place made
United States: Massachusetts, Worcester
Physical Description
paper (overall material)
overall: 12 cm x 11.5 cm x 7.1 cm; 4 23/32 in x 4 17/32 in x 2 25/32 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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