Descriptive geometry for students in engineering science and architecture; a carefully graded course of instruction (1915)
Armstrong, Henry F. (Henry Fry), 1868- · New York, J. Wiley & sons, inc.; [etc., etc.] · leaf 93
er plane, having the same V.T.,and tangent to the same 60° cone, therefore also at 60° to the H.P. There are,therefore, two planes, RST and RSN, satisfying the conditions. In Fig. 87 a line AB is given, and it is shown how a plane of any particularinclination to the H.P., greater than the… … Fig. 87. The cone may be represented by drawing the line cd to make with XYan angle, a, equal to the given inclination of the required plane, and withcd, its plan, as radius, drawing the circular H.T. of its curved surface. Next,find the H.T. of the given line AB a.t H, and through H draw tangent…
Geometry, Descriptive
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