Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 62
f its projections are sufficient to determinethe line A, we have the following proposition: Corollary. Given Ap and either Ah or A; to find theremaining projection and the three traces of the line. VI, § 60] THE PROFILE PLANE 41 Analysis. The desired result may be obtained by reversingthe preceding… … Fio. 77. A general plane Q is shown in Fig. 77, intersecting H, V,and P, in the traces HQ, VQ, and PQ. It is evident that HQand VQ intersect on HV (the intersection of H and V, orground line), IIQ and PQ intersect on IIP, and VQ and PQ
Geometry, Descriptive
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