Ames, William L. (William Lewis), 1855-, Wischmeyer, Carl · New York, McGraw-Hill book company, inc.; [etc., etc.] · leaf 45
ne with base in 3 34 DESCRIPTIVE GEOMETRY H, axis in V, the elements of which make the given angle 6with H. If the required plane is tangent to this cone, theelement of tangency and the traces form a right triangle ofwhich a side and two angles are known. Construct a righttriangle with an element… … Fig. 60. Fig. 61. CB comes to X, C and B will coincide with the traces of theplane. Take the vertex of the cone as center and with thelength of B as radius draw an arc. From the point wherethis arc cuts X draw the H trace tangent to the base of thecone, and the V trace through the vertex of the…
Geometry, Descriptive
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