Open Triangle

Open Triangle

<< >>
Usage conditions apply
Downloads
Description
This unmarked 8" 30°-60°-90° triangle with an open interior is made of two different woods, with a section of darker wood laid between two sections of lighter wood. The dating of other objects from this donor suggests the triangle was made around 1900. Compare to MA.335330. Neither Keuffel & Esser nor the Eugene Dietzgen Company advertised triangles like this one. James W. Queen of Philadelphia did offer walnut or mahogany triangles with a maple inlay, but the firm did not sell the instrument in the 8-inch size.
Reference: James W. Queen & Co., Priced and Illustrated Catalogue of Mathematical Instruments (Philadelphia, 1883), 51.
Location
Currently not on view
Object Name
triangle
date made
ca 1900
Physical Description
wood (overall material)
Measurements
overall: 11.7 cm x 20 cm x.5 cm; 4 19/32 in x 7 7/8 in x 3/16 in
ID Number
MA.335329
catalog number
335329
accession number
305958
Credit Line
Gift of Eunice L. Hoffman
subject
Mathematics
Drawing Instruments
See more items in
Medicine and Science: Mathematics
Squares and Triangles
Science & Mathematics
Data Source
National Museum of American History
Nominate this object for photography.   

Our collection database is a work in progress. We may update this record based on further research and review. Learn more about our approach to sharing our collection online.

If you would like to know how you can use content on this page, see the Smithsonian's Terms of Use. If you need to request an image for publication or other use, please visit Rights and Reproductions.

Note: Comment submission is temporarily unavailable while we make improvements to the site. We apologize for the interruption. If you have a question relating to the museum's collections, please first check our Collections FAQ. If you require a personal response, please use our Contact page.