Line Bisecting Angle Between Focal Radii on Ellipse Small 320×131 Medium 640×262 Large 1024×419 Download Tiff Original 2400×981 | (135.6 KB) Description Illustration of half of an ellipse. "If through a point P of an ellipse a line is drawn bisecting the angle between one of the focal radii and the other produced, every point in this line except P is without the curve." Keywords bisect, center, chords, conic sections, ellipse, ellipses, focal chord, focal radii, foci, focus, line bisecting angle, major axis, minor axis, oval, ovals, radius, section Galleries Conic Sections: Ellipses Source: G.A. Wentworth Plane And Solid Geometry (Boston: Ginn & Company, 1899) 434
