Construction of an Ellipse
Illustration of half of an ellipse and its auxiliary circle used to construct an ellipse by points, having given its two axes.
auxiliary circle, center, chords, conic sections, construct, construction, corresponding points, ellipse, ellipses, focal chord, focal radii, foci, focus, major axis, minor axis, oval, ovals, radius, section
G.A. Wentworth Plane And Solid Geometry (Boston: Ginn & Company, 1899) 431
Courtesy the private collection of Roy Winkelman