Young, George, jr, Baxter, Hubert Eugene, joint author · New York, Macmillan · leaf 118
f the path of the point duringrotation, the required point will lie somewhere oh it. In orderto determine the distance of the required point from y, lay outthe right triangle 1 at any convenient location on the drawing.Make it equal to the right triangle aoiy in Fig. 99, i.e. with itsbase equal to… … DESCRIPTIVE GEOMETRY [VI, § 91 (loO After a few examples have been solved, the actual constructionof such a triangle as 1 may be omitted altogether, the requireddistance being determined directly with the dividers. In Fig. 101, the point b, lying onthe plane Z, is rotated about thetrace ZZ, into V.…
Geometry, Descriptive
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