Ames, William L. (William Lewis), 1855-, Wischmeyer, Carl · New York, McGraw-Hill book company, inc.; [etc., etc.] · leaf 30
of a line into either plane of projection about an axislying in that plane and passing through the correspondingtrace of the line, (c) The revolution of a plane into eitherplane of projection about its intersection with that planeas axis. Problem 6.—To revolve a given point into one of the planesof… … Fig. 21. Fig. 22. into H (Fig. 21). Since the plane of revolution of the pointwill be perpendicular to the axis of revolution, a line drawnthrough p* perpendicular to the axis will contain therevolved position of thepoint. The radius ofthe circle described bythe point is the short-est distance from…
Geometry, Descriptive
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