Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 164
to cr. If now we attempt to revolve the point t,this point, being on the axis of revolution, will not move.Hence the revolved position of the line, Ar, passes through crand t. (2) Let the line A, Fig. 222, which is to be revolved aboutVQ into V, be parallel to VQ. Revolve any point c, of A, tocr.…
Geometry, Descriptive
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