Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 123
Fig. 175. be determined if we find where A intersects a line in plane Q.This line cannot, however, be any line chosen at random in Q,for such a line will probably not intersect A. Let a plane, X,be passed through the line A. Then X will intersect Q in aline, T. This line Y is a line in the plane Q,…
Geometry, Descriptive
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