Spanton, J. Humphrey (John Humphrey) · London, Macmillan and Co., Limited; New York, The Macmillan Company · leaf 122
Fig. 216. Fig. 217. If the plane is placed obHquely to the aperture, as in Fig. 216,the section obtained is an ellipse. By placing the plane parallel to the side of the cone, as in Fig. 217, we get as sec-^^ tion, the parabola. If we place the planeat right angles to theaperture, we obtain… … Fig. 2 obtain a conic section to suit anyto shape or size. A truncated cone or frustum is the part of the cone below anysection as A or B, Fig. 214. The Ellipse. An ellipse has two unequal diameters or axes, which areat right angles to each other. The longer one is calledthe transverse diameter,…
Geometrical drawing · Design · Drawing
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
