Tangent From External Point to an Ellipse
Illustration of how to draw a tangent to an ellipse from an external point.
Keywordsellipse, oval, ellipses, ovals, conic sections, section, radius, focus, center, foci, chords, major axis, minor axis, external point, focal chord, focal radii, tangent line
GalleriesConic Sections: Ellipses
G.A. Wentworth Plane And Solid Geometry (Boston: Ginn & Company, 1899) 435