Higbee, F. G · New York, John Wiley & Sons · leaf 130
the shortest line which can be drawn com-mon to both cone and plane S, and since it is perpendicular toAB, CD will be the minor axis of the curve of intersection. Tofind its true size revolve the axes of the curve into V about sSand construct the ellipse AyBvCyDv. If the projections of this curve… … Fig. 95. Construction. When the axis of the cone is oblique to H andV, the base being any plane curve. In Fig. 96, S is the given plane cutting the cone whose apexis Q. Pass auxihary planes R, \J, V, etc., through 0 perpendicu- I20 ESSENTIALS OF DESCRIPTIVE GEOMETRY lar to H. The auxiliary plane R…
Geometry, Descriptive
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