Higbee, F. G · New York, John Wiley & Sons · leaf 148
through the apices of thetwo cones cutting elements from each. These elements beingin the same plane will intersect each other in points common toboth surfaces, or points on the curve of intersection. Construction. When the bases of the given cones are in thesame plane, as in Fig. no. Draw a line… … Fig. 110. 138 ESSENTIALS OF DESCRIPTIVE GEOMETRY allel to H so that all the H traces of the auxihary planes wiU beparallel to it. The plane S cuts one element from the righthand cone and two elements from the other; the elements in-tersect at B and D, two points on the curve of intersection. Inlike…
Geometry, Descriptive
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