Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 198
normal alone fur-nishes no point on either of these traces.Hence at least one line, as J, lying inthe tangent plane, is required in the projection drawing tosupply a necessary point, as s. (See Prob. 10, § 115.) In determining the traces of a tangent plane by the use ofthe normal, therefore, the… … Fig. 259. CHAPTER XIX TANGENT PLANES TO CONES AND CYLINDERS 158. The Cone and Cylinder. Definitions. The terms cone andcylinder are variously used, both in mathematical and in popu-lar language, to denote either surfaces, or solids bounded inpart by these surfaces. As a surface, a cone may be…
Geometry, Descriptive
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
