Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 43
Fig. 45. 33. Special Positions of the Line. The student should satisfyhimself of the truth of the following propositions by direct visualization. 1. If a line A intersectsthe ground line, Ah and Avintersect on GL, and in thesame point as A (Fig. 44). 2. Conversely, if Ah andFlG- 4i- jiy intersect…
Geometry, Descriptive
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