Model for Descriptive Geometry by A. Jullien - Angle between Two Lines
date: label: date made
content: ca 1880
name: label: maker
content: Jullien, A.
notes: label: Description
content: The given lines are the black strings: ab’ and dc’. They intersect at (m, m’). Segment ad on the horizontal plane creates a triangle with the given lines as sides. Point n on the horizontal plane is perpendicular to ad through point (m, 0). By rotating the triangle about line ab onto the horizontal plane, point (m, m’) maps to point M<sub>2</sub>. Angle aM<sub>2</sub>d is the angle between the two given lines.
label: Description
content: For more details, see COLL.1986.0885 and 1986.0885.01.01.
label: Location
content: Currently not on view
place: label: place made
content: France: Île-de-France, Paris
topic: label: Subject
content: descriptive geometry
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: Jullien Geometric Models
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1986.0885.01.25
label: catalog number
content: 1986.0885.01.25
label: accession number
content: 1986.0885
objectType: label: Object Name
content: geometric model
physicalDescription: label: Physical Description
content: paper (overall material)
label: Physical Description
content: metal (overall material)
label: Measurements
content: overall: 6.5 cm x 7.5 cm x 6.5 cm; 2 9/16 in x 2 15/16 in x 2 9/16 in