Young, George, jr, Baxter, Hubert Eugene, joint author · New York, The Macmillan Co. · leaf 37
e from H, swing itabout c as a center until it lies in the same line perpendicular to F asdoes c. 5. e is in a straight Une parallel to HA with d but at 19 from P.Rotate it about its own H projection tiU it lies in H, keeping it in aplane parallel to V. 6. / lies on HA, 3 from P. Move / upward 14.… … PROJECTION OF 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 ohas generated the line aa. Simi-larly the motions of the projec-tions have generated the linesaa and…
Geometry, Descriptive
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