Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 88
88] INTERSECTIONS — DEVELOPMENTS 67 88. Working Method for Finding the True Length of a Line. In the solution of many problems the true length of a line isfound in order to be used as a radius for setting compasses ordividers. The angle made with H or V is not needed. Henceit is sufficient to… … Fig. 113 end of the line fixed (Prob. 3, First Method, § 78), thus givingavc as the true length. Now the point c can be found by draw-ing through bv a horizontal line, intersecting the projector avahat e, and then laying off the distance ec directly with thedividers ecpial to ukbh. Hence the…
Geometry, Descriptive
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