Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 165
ne that is determined by the two lines. Problem 22. To find the angle between two intersecting lines. Analysis. Find the plane containing the given lines. Aboutone trace of this plane, revolve the lines into the correspondingcoordinate plane, when the true angle between them will appear. 144… … Fig. 223.
Geometry, Descriptive
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