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 92
ane, may then be drawn. It will be realized next, that, as all the generators of the vertical cone meetthe H.P. at the same incUnation, therefore the generator whose plan is ab. is atthe same inclination as the generator whose elevation is ac, and whose inclinationis indicated by an arrow-headed… … Fig. 86. The converse of this problem is specially useful. For instance, if it berequired to fmd the traces of a plane of given inclination to the H.P. having itsH.T. in a given direction, it is only necessary to set up a right circular cone whosegenerators are at the given inclination for the…
Geometry, Descriptive
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