Drafting Triangle
date: label: date made
content: late 19th century
notes: label: Description
content: This 7-1/2" 30°-60°-90° triangle has a beveled hypotenuse and a 9/16" round hole at the center for positioning and holding the instrument. Compare to 304826.137 and 335331. See also 1983.0238.01 and 1979.0876.01. The triangle was found in the Physical Sciences collections in 1979 with objects that suggest an association with Cleveland Abbe (1838–1916), an American engineer, astronomer, and meteorologist who worked for the U.S. Weather Service from 1871 until shortly before his death.
label: Description
content: Reference: accession file.
label: Location
content: Currently not on view
topic: label: Subject
content: Mathematics
label: Subject
content: Drawing Instruments
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Squares and Triangles
label: See more items in
content: Science & Mathematics
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1979.0876.02
label: catalog number
content: 1979.0876.02
label: accession number
content: 1979.0876
objectType: label: Object Name
content: triangle
physicalDescription: label: Physical Description
content: wood (overall material)
label: Measurements
content: overall: 11 cm x 19 cm x .2 cm; 4 11/32 in x 7 15/32 in x 3/32 in