Young, George, jr, Baxter, Hubert Eugene, joint author · New York, Macmillan · leaf 158
WiV % Fio. 137 I 140 DESCRIPTIVE GEOMETRY [VII, § 127 III» Numerous Centeks (Fig. 138). The major and minoraxes are given. The first step is to locate the foci, / and /(§ 123). Next locate a number of points, a, h, c, etc., which areknown to lie on a true ellipse (§ 124, II). At the points…
Geometry, Descriptive
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