Object Details
Description
This 5-1/2" 20°-70°-90° wooden triangle has a 3/8" round hole at the center for positioning and holding the instrument. Compare to 304826.137, 335331, and 1979.0876.02. A previous user has written the numbers 20, 70, and 90 at the appropriate corners. For other drawing triangles with unusual angle measurements, see 334622 and 1990.0690.01. The Department of Mathematics at Brown University gave this object to the Museum in 1973.
Location
Currently not on view
Credit Line
Gift of Brown University Department of Mathematics
date made
ca 1900
ID Number
MA.304722.09
catalog number
304722.09
accession number
304722
Object Name
triangle
Physical Description
wood (overall material)
Measurements
overall: 6.6 cm x 14 cm x .1 cm; 2 19/32 in x 5 1/2 in x 1/32 in
See more items in
Medicine and Science: Mathematics
Squares and Triangles
Science & Mathematics
Data Source
National Museum of American History
Subject
Mathematics
Drawing Instruments
Link to Original Record
Record ID
nmah_904225