Safe-T 45779 Blackboard Protractor
date: label: date made
content: ca 2000
label: Associated Date
content: 2000
name: label: Associated Name
content: Extra Measures, Inc.
label: maker
content: Safe-T Products, Inc.
notes: label: Description
content: This oversized white plastic semicircular protractor may be used at a chalkboard or whiteboard. A smaller semicircle is cut out of the protractor's interior. Three curved grooves form a third semicircle between these two semicircles. The protractor is divided by single degrees and in three rows of divisions. It is marked by tens from 0° to 180° (left to right) and from 180° to 0° (right to left).
label: Description
content: An oversized ruler, or scale of equal parts, divided to mm and marked by single cm from 1 to 10, is on the diameter of the innermost semicircle. A notch for the origin point of the protractor is at the center of this edge. Another scale of equal parts, divided by 16ths of an inch and marked by ones from 1 to 6, is along the outer lower edge.
label: Description
content: The protractor is marked: Angles Opening Left (>) Use Upper Scale; Angles Opening Right (<) Use Lower Scale (/) SAFE-T PROTRACTOR® #45779. A recycling logo for plastic type 6 appears in the lower right corner. The protractor retailed for approximately $13 in 2011.
label: Description
content: See also ID numbers 1998.0033.02 and 1999.0117.02.
label: Location
content: Currently not on view
place: label: place made
content: United States: Illinois, La Grange
label: Associated Place
content: United States: Illinois, Bensenville
topic: label: Subject
content: Mathematics
label: Subject
content: Protractor
label: Subject
content: Education
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Science & Mathematics
label: See more items in
content: Protractors
creditLine: label: Credit Line
content: Gift of Extra Measures, Inc.
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 2000.0160.03
label: accession number
content: 2000.0160
label: catalog number
content: 2000.0160.03
objectType: label: Object Name
content: protractor
physicalDescription: label: Physical Description
content: plastic (overall material)
label: Measurements
content: overall: 1.5 cm x 47.5 cm x 30.6 cm; 19/32 in x 18 11/16 in x 12 1/16 in