Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 279
Fig. 318. surfaces (§ 185). It is always possible to place planes so thatthey will cut elements, that is, straight lines, from each of thegiven surfaces. To verify this statement, let us study theconditions which are thus imposed upon the planes. To cut elements from a cylinder, the secant plane…
Geometry, Descriptive
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