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Model for Descriptive Geometry by A. Jullien - Distance from a Point to a Plane

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Model for Descriptive Geometry by A. Jullien - Representation of a Line (Trace, Angle of Projection with a Plane, Distance between Two Points)

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Nature

On Certain New Terms or Terms used in a New or Unusual Sense in Elementary Universal Geometry

Point, Line, Plane, Space, Extension A LINE may as usual be understood to mean a right line unless the contrary is stated.