Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 70
Fig. 91. Fig. 92. then if GXLX is taken perpendicular to Ah, the line A will beseen endwise, and the projection Af will become a point. Another simple and useful projection of a straight line re-sults when the line is parallel to a plane of projection. Thiscan always be attained by means of a…
Geometry, Descriptive
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
