Ordinate and Major Axis of Ellipse Small 320×175 Medium 640×350 Large 1024×560 Download TIFF Original 2400×1313 | (156.6 KB) Description Illustration of half of an ellipse. The square of the ordinate of a point in an ellipse is to the product of the segments of the major axis made by the ordinate as the square of b to the square of a. Keywords auxiliary circle, center, chords, conic sections, ellipse, ellipses, focal chord, focal radii, foci, focus, major axis, minor axis, ordinate, oval, ovals, point, radius, ratio segments, section Galleries Conic Sections: Ellipses Source: G.A. Wentworth Plane And Solid Geometry (Boston: Ginn & Company, 1899) 432