Analytic geometry and principles of algebra (1913)
Ziwet, Alexander, 1853-1928, Hopkins, Louis Allen, joint author, Hedrick, E. R. (Earle Raymond), 1876-1943 · New York, The Macmillan Company · leaf 211
respect to the perpendicular bisector of FiF.,.These axes of symmetry are called the axes of the ellipse ; theirintersection 0 is called the center of the ellipse. 205. Axes. The points A^, A., B,, B. (Figs. 83 and 84)where the ellipse intersects these axes are called vertices.The distance AoA^ of… … X, § 206] ELLIPSE AND HYPERBOLA 199 and since, by symmetiy, A^Fo = FiA^, we haveA,F, + F,F^ + F, A, = A, A, = 2 a.The distance A.^A^ = 2 a, which is called tlie major axis, mustevidently be not less than the distance FoF^ between the foci,which we shall denote by 2 c. The distance BoB^ of the other…
Geometry, Analytic
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