Parallel Tangents to an Ellipse Small 320×230 Medium 640×459 Large 1024×735 Download Tiff Original 2400×1723 | (200.1 KB) Description Illustration showing that tangents drawn at the ends of any diameter are parallel to each other. Keywords center, chords, conic sections, ellipse, ellipses, external point, focal chord, focal radii, foci, focus, major axis, minor axis, oval, ovals, Parallel, radius, section, tangent line, tangents Galleries Conic Sections: Ellipses Source: G.A. Wentworth Plane And Solid Geometry (Boston: Ginn & Company, 1899) 438
