Ames, William L. (William Lewis), 1855-, Wischmeyer, Carl · New York, McGraw-Hill book company, inc.; [etc., etc.] · leaf 43
ive datawith reference to H and V (Fig. 55). its H trace, its V trace,the angle K, or true angle between the H and V traces, andthe angles 6 and <^, or the angles made by the plane with Hand V respectively. Any two of these are enough todetermine the other three. r ■-M A° -4. i ■n l Fig. 54.… … Fig. 55. Fig. 56. will make the same angle with the plane of the base thatan element does. Hence, to find ^ construct a cone withbase in V and tangent to the V trace of the plane, and itsaxis in H and vertex in the H trace of the plane. The anglewhich the elements of this cone make with V will be…
Geometry, Descriptive
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