Model for Descriptive Geometry by A. Jullien - Angle between Two Lines


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 M2. Angle aM2d is the angle between the two given lines.

For more details, see COLL.1986.0885 and 1986.0885.01.01.

Date Made: ca 1880

Maker: Jullien, A.

Location: Currently not on view

Place Made: France: Île-de-France, Paris

Subject: descriptive geometry


See more items in: Medicine and Science: Mathematics, Science & Mathematics, Jullien Geometric Models


Exhibition Location:

Data Source: National Museum of American History

Id Number: 1986.0885.01.25Catalog Number: 1986.0885.01.25Accession Number: 1986.0885

Object Name: geometric model

Physical Description: paper (overall material)metal (overall material)Measurements: 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


Record Id: nmah_1802212

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