Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 61
rojection of any straight line can beobtained from its horizontal and vertical projections by findingthe profile projections of any two points in the line (§ 57).The profile trace can be found by noting the point in whichthe given line pierces the edge view of P. Construction (Fig. 76). Ah and Av… … Fig. 76. HP and VP are both edge views of P, we have uh and uv asthe H- and F-projections of the point u ; from uh and uv rindup, the actual profile trace. As a check, up must lie in A. Since any two of its projections are sufficient to determinethe line A, we have the following proposition:…
Geometry, Descriptive
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