Descriptive geometry for students in engineering science and architecture; a carefully graded course of instruction (1915)
Armstrong, Henry F. (Henry Fry), 1868- · New York, J. Wiley & sons, inc.; [etc., etc.] · leaf 18
LAX AND ELEVATION FORMS FOR PLANE RECTILINEAL FIGURES Section 3. Suppose it be required to lind the projections of any plane figureinclined at a given angle to one of the projection i)lanes and having one of itsedges in that projection plane at a given inclination to the XV. Illustrationsof such a… … Fig. 6. Fig. 7. angle, and yet leave one edge in the V.P., it must be arranged so that when theline representing it in plan is moved to enclose the given angle a° with Al. oneedge of it, say AB, represented in elevation at ab\ is in plan a point, as at ab,and will remain as a point in AT. The…
Geometry, Descriptive
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