Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 210
Fig. 276 (repeated). XIX, § 162] TANGENT PLANES 189 in the tangent plane at b (§ 162, b). But in attempting to passa plane through F and K, only the traces, s3 and t3, of Kcan be found; neither trace of F is available. Therefore,choose any point in F; a convenient point is the vertex, o. … Fig. 277. Through o draw the auxiliary line L, parallel to K\ then Llies in the plane of F and K (§ 108, Ex. 1). Line L suppliesthe traces s4 and tt. These, taken in connection with the tracesof K, are sufficient to locate the traces, HT and VT, of therequired tangent plane. Problem 32. To pass a…
Geometry, Descriptive
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
