Young, George, jr, Baxter, Hubert Eugene, joint author · New York, The Macmillan Co. · leaf 54
o. State the ratios betweenthe segments of the projections and those of the true length. Ill, § 31] PROJECTION OF LINES 37 31. Traces of a Line. Every normal-case line, if sufficientlyextended, meets the planes of projection in points which arecalled the traces, or piercing points, of the line.… … Fig. 32 6 ° indicates a trace of vt = vertical trace. tit = horizontal trace. vt = horizontal projection of vertical trace. ht= vertical projection of horizontal trace. Fig. 32 aFigure 32 b shows in projection the same line as was used in32 a. Let it be required to find its traces As the line is…
Geometry, Descriptive
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