Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 104
a F-trace, a point on VQ is determined by notingwhere HQ intersects GL. Corollary II. To find the plane which contains three givenpoints not in the same straight line. Analysis. Connect any two points by a straight line, andthrough the third point draw a second line parallel to the first, X, § 107]… … ^k\ \s>^ Cjf /1Xi / / 4 / 7 V ^> bv; Fig. 141. Fig. 142. No figure for the general case is thought necessary. It isinteresting to note that this device may be used for passing aplane through a profile line and a point. Thus (Fig. 142), letab be the given line and c the given point. Draw the…
Geometry, Descriptive
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