Open Triangle

Open Triangle

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Usage conditions apply
This unmarked 6" 30°-60°-90° triangle with an open interior is made of two different woods, with a section of darker wood set between two sections of lighter wood. The dating of other objects from this donor suggests the triangle was made around 1900. Compare to MA.335329. James W. Queen of Philadelphia sold a similar walnut or mahogany triangle with a maple inlay for 50¢ in 1883.
Reference: James W. Queen & Co., Priced and Illustrated Catalogue of Mathematical Instruments (Philadelphia, 1883), 51.
Currently not on view
Object Name
date made
ca 1900
Physical Description
wood (overall material)
overall: 8.6 cm x 5 cm x.3 cm; 3 3/8 in x 1 31/32 in x 1/8 in
ID Number
catalog number
accession number
Credit Line
Gift of Eunice L. Hoffman
Drawing Instruments
See more items in
Medicine and Science: Mathematics
Squares and Triangles
Science & Mathematics
Data Source
National Museum of American History
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