Young, George, jr, Baxter, Hubert Eugene, joint author · New York, Macmillan · leaf 50
nclination to H, <i>, asrequired. Since three planes of projection are used in the operation,three projections result. Two are elevations and one is a plan.The plan is common to the two elevations. The process of mak-ing the new projection is sometimes more easily visualized ifthe student… … 32 DESCRIPTIVE GEOMETRY [HI, § 27 length and the angle of inclination to V. In this case the newplane must be taken perpendicular to V and parallel to the given line, so as to show the true anglewith V. Of course the true lengthsas determined in Figs. 28 and 29should agree. 28. Comparison of the…
Geometry, Descriptive
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