Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 81
RY [VIII, § 83 Problem 5. To find the projections of a line making given angleswith H and V. In order to bring a definite solution it will be assumed thatthe true length, slope, and location of one end of the line areknown. The general solution to the problem as stated aboveconsists of four series… … Fig. 105. end. Take an axis through a perpendicular to H, and revolvethe line to the position ac (ahch, acv), parallel to V, where aVshows the true length of the line and its angle, a, with H(Prob. 3, First Method, § 78). Also take an axis through aperpendicular to V, and revolve the line to the…
Geometry, Descriptive
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