Young, George, jr, Baxter, Hubert Eugene, joint author · New York, Macmillan · leaf 193
. The idea is the same in either case.III. Cylinders. The same construction will suffice forcylinders if it is kept in mind that a cylinder may be consideredas a cone with its apex at an infinite distance. 164. To Pass a Plane Tangent to a Cone (or a Cylinder)through a Point Outside. Every tangent… … Fio. 168 VIII, § 1551 CURVED SURFACES 175 // the cane rests on H, the H trace of the required plane willbe tangent to the base of the cone. Two tangent planes maybe passed through any point outside the surface. < If the base of the cone docs not rest on H, an auxiliary planeparallel to H, and…
Geometry, Descriptive
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