Ames, William L. (William Lewis), 1855-, Wischmeyer, Carl · New York, McGraw-Hill book company, inc.; [etc., etc.] · leaf 97
projections andtrue form of the section. 334. A cone of revolution has a vertex angle of 60° Show thetraces of a plane which will cut the cone in an ellipse whose major axisis 2 in. and minor axis 1 in. Note—See text on page 101. 335. A cone of revolution of vertex angle 60° is cut by a plane… … Fig. 166. SECTIONS 87 Show its intersec-
Geometry, Descriptive
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