Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 266
d the intersection of a pyramid or prism and aplane. Analysis. Let a pyramid be given. Consider the lateraledges as the elements of a cone. Find the points in whichthese elements intersect the given plane, using the method ofProb. 41 or 42, § 180. Connect the points thus found bystraight lines. Let… … Fig. 309. 246 DESCRIPTIVE GEOMETRY [XXII, § 181 Construction (Fig. 310). The given solid is a pyramid.The points in which the lateral edges 0-1, 0-2, 0-3, 0^4 inter-sect the given plane Q are found by auxiliary planes X, Y, Z,
Geometry, Descriptive
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