Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 131
y applying thepreceding method, as follows. Using the auxiliary plane Xwhich contains J and is perpendicular to H, we find that theline J intersects the plane of the lines ab and be in the pointd. Using the auxiliary plane Y, containing K, this line inter-sects the plane of the lines ac and be in…
Geometry, Descriptive
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