Foci Distances on an Ellipse Small 320×136 Medium 640×273 Large 1024×436 Download Tiff Original 2400×1023 | (191.8 KB) Description Diagram that illustrates "The algebraic sum of the distances of any point from the foci of a conic is greater or less than 2a, according as the point is without or within the curve." Keywords cone, conic section, conics, ellipse, ellipses, foci, focus Galleries Conic Sections: Ellipses Source: Arthur Latham Baker The Elements of Solid Geometr with Numerous Exercises (Boston, MA: Ginn & Company, 1893)
