Perspective and geometrical drawing : adapted to the use of candidates for second and third-class teachers' certificates (1887)
McGuirl, Thos. H. (Thomas H.) · Toronto, Ont. : W. Briggs · leaf 28
d make BA = 3 (length of line) ; join B C.V. and A C.Y.From B measure off BE = 4 (distance within P.P.); joinE LMP, cutting B C.Y. in D ; through D draw DC to lineA C.Y. and parallel to AB. CD is line required, for it isequal to AB, and its near extremity D is same distance tothe left that B is,… … Draw H.L., B.L., L.D., as before, and mark point RMP.Make OC = 4, join C C.V. From C measure off CB - 2, andfrom B mark off BA = 3 (length of line) ; join B RMP andA RMP, to cut C C.V. in E, D. ED is the line required, forDE is parallel to LD, and therefore perpendicular to BL.EC = BC and DC = AC,…
Geometrical drawing · Perspective
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