Young, George, jr, Baxter, Hubert Eugene, joint author · New York, The Macmillan Co. · leaf 192
allel toX, the H trace of which is tangent to the base of the cylinderas y or Z, will contain an element and will be parallel to ab. If the given surface is a cone, a guiding line passed throughthe apex and parallel to the given line may be used. Thetraces of this line give one point on each of the… … 176 DESCRIPTIVE GEOMETRY [VIII, § 155 If the inclination of the given line is equal to that of the cone,there is but one tangent plane. If the inclination of the lineis greater than that of the cone, the construction is impossible. 156. To Pass a Line Tangent to a Cone or a Cylinder. Fol-lowing the…
Geometry, Descriptive
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