Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 260
be found.The construction is similar to, and entirely independent of,that used for finding the intersection of plane Q. The result-ing section is 21-22-23 . . . 28-21. Since this is a figure lying in plane R, its true size maybe found by revolving about either trace of R, say aboutHR into H (Prob.… … Fio. 307. 240 DESCRIPTIVE GEOMETRY [XXII, § 180 any convenient position. Make 21-22 equal to 21r-22r; 22-23 equal to 22-23r; and so on up to 28-21 equal to 28r-21r. This straight line is the developed right section. Draw perpendiculars, representing elements, at 21, 22, etc.Make 21-1 equal to the…
Geometry, Descriptive
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