Young, George, jr, Baxter, Hubert Eugene, joint author · New York, Macmillan · leaf 71
udent should analyze this latter case as we did abovefor Fig. 48 a. He should then try to draw a line passing fromthe second, through the first and thence into the fourthquadrant; and as many other cases as may suggest them-selves. 44. Profile Trace of a Line. In § 31 only two traces of a linewere… … In Fig. 49, the line ah pierces V aX vt, H at ht, and P at jrf. Follow the line outfirst on V, then onH; and visualizeit. Rememberingthat pi and j)<* arethe H and V pro-jections of the Ptrace,construct theP projection ofthe line. Then theposition of the Ptrace is apparent. EXERCISE SHEET XVITake…
Geometry, Descriptive
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