Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 218
e. Find the point in which thisline pierces the plane of the base of the cylinder. From thispoint draw a line tangent to the base. Pass the required tan-gent plane through the tangent line and the line first drawn.In general, two tangent lines, and hence two tangent planes,are possible.… … to the elements of the cylinder. From this on the construc-tion is the same as for the corresponding case of the cone(Prob. 32, Case I). The required planes are Q and T. Case II. Tlie base of the cylinder does not lie in II or V(Fig. 286). The base of the given cylinder lies in the plane…
Geometry, Descriptive
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