Young, George, jr, Baxter, Hubert Eugene, joint author · New York, The Macmillan Co. · leaf 116
n of the path of the point duringrotation, the required point wQl lie somewhere on 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 aa/y in Fig. 99, i.e. with itsbase equal… … 100 DESCRIPTIVE GEOMETRY [VI, § 91 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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