Young, George, jr, Baxter, Hubert Eugene, joint author · New York, Macmillan · leaf 39
nce from H, s^ing itabout c as a center until it hes in the same line perpendicular to V asdoesc. 5. e is in a straight line parallel to HA with d but at 19 from P.Rotate it about its own H projection till it Ues in H, keeping it in aplane parallel to V. 6. / hes on HA, 3 from P. Move / upward 14.… … PROJECTION OP LINES 14. Generation of a Straight Line. If any point, as a,Fig. 15,-is moved to a new position, a, the projections also move to new positions, as shown.During its motion, the point ahas generated the line aa. Simi-larly the motions of the projec-tions have generated the linesoo and…
Geometry, Descriptive
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