Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 131
Fig. 186. Fig. 187. other. The visibility of either projection must be determinedby means of information obtained from the other projection.Thus, to determine the visibility of the Zf-projection, take anypoint in which intersect the projections of two lines not in thesame plane. For example,…
Geometry, Descriptive
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