Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 70
g a secondaryplane of projection unlessthe new projection is insome way simpler thanthe original projections.A point always projects as a point, and cannot be madeany simpler. G L ^<P< bh- r Fig. 90. VII, § 70] SECONDARY PLAXES OF PROJECTION 49 The simplest projection of a straight line is a…
Geometry, Descriptive
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