Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 165
Fig. 223. … Fig. 224. about HX into H. To accomplish this most readily, revolvetheir point of intersection, o, to or (Prob. 21, Working Rule,§ 138). Then AT passes through or and the trace s1} while Brpasses through or and the trace s2 (Corollary, § 138). Theangle, 8, between Ar and BT is the true angle…
Geometry, Descriptive
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