Anthony, Gardner Chace, 1856- [from old catalog], Ashley, George Francis, [from old catalog] joint author · Boston, D. C. Heath & co. · leaf 91
herefore, two possible tangent planes.Since the base of the cone lies in H^ thehorizontal traces, HS and HN of the tangentplanes aS and iV, will be tangent to the baseat k\ ^^d ^1- The vertical traces of thetangent elements, V and o, determine thenecessary points in VS and F7V, the requiredvertical… … PLAXE TAXGEXT TO COXE 75 must contain a line cIra^Yn through the apexof the cone and tlie given point. It must alsohave one of its traces tangent to the base ofthe cone, since this base is supposed to lie ina coordinate plane. Method. 1. Draw the projections of aline passing through the apex of the…
Geometry, Descriptive
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