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 plastic platform model shows the intersection of four planes. The green base serves as the platform and the other three intersect in a line perpendicular to the platform. The third plane (which is represented by a yellow triangle between a pink and a dark green triangle) is attached to the base along the perpendicular to the triangle fromed by the intersection of the base, the two side triangles, and the line joining the vertices of the two side triangles.It also is perpendicular to the vertical line of intersiceion of these triangles. Hence a line perpendicular to two lines.
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
A. Harry Wheeler
place made
United States: Massachusetts, Worcester
Physical Description
plastic (overall material)
overall: 4.7 cm x 7.7 cm x 7.7 cm; 1 27/32 in x 3 1/32 in x 3 1/32 in
ID Number
accession number
catalog 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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