Young, George, jr, Baxter, Hubert Eugene, joint author · New York, The Macmillan Co. · leaf 47
TRY [III, § 27 27. Second Method for Finding True Length. The secondmethod, as well as the first, depends on having the hne parallelto a plane of projection. It differs from the first method, however,in that the plane is brought to the line, rather than the line tothe plane. The student is already… … y/hen using V When using V. Fig. 27 The only extension of that idea which is required here is thatthe third projection may be made on a plane perpendicular toH, but not necessarily perpendicular to V. In fact, the newplane may be chosen parallel to any given line, thus making thatline a…
Geometry, Descriptive
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