National Museum of American History
Model for Descriptive Geometry by A. Jullien - Parallel Lines (Given a Plane and a Line Parallel to the Plane, Construct the Parallel Plane Containing the Line)
Jullien, A. · ca 1880
Plane APA’ (right construction) and line through (m, m’) parallel to the plane and to line cd’ on the plane are given (red strings). Then the plane BQB’ parallel to plane APA’ is constructed.
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