Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 60
, andfrom this to the F-projection;or vice versa. Construction (Fig. 75). Letab (ahbh, avb) be the givenline. Find apb. Now if ch isgiven, project from c* to cp inabp; and from cp to C in <if>r.If c is given, c* may be foundby reversing the process. The line o.b may be pro-duced indefinitely,… … 40 DESCRIPTIVE GEOMETRY [VI, § 59 59. Profile Trace of a Line. The general line, oblique to H,V, and P, will pierce all these planes. Hence, besides thehorizontal trace s, and the vertical trace t, it will have a profiletrace, u, which must lie in the profile projection of the line. Given the…
Geometry, Descriptive
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