Conic Section Showing Parabola Small 207×320 Medium 413×640 Large 661×1024 Download Tiff Original 1550×2400 | (767.5 KB) Description Illustration showing the definition of a parabola as a conic section. "The section of a right circular cone made by a plane parallel to one, and only one, element of the surface is a parabola." Keywords conic sections, coordinates, directrix, focal chord, focus, latus rectum, parabola, parabolas, parabolic segment, section Galleries Conic Sections: Parabolas Source: G.A. Wentworth Plane And Solid Geometry (Boston: Ginn & Company, 1899) 422
