Tangents to an Ellipse

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Illustration showing the tangents drawn at two corresponding points of an ellipse and its auxiliary circle cut the major axis produced at the same point.

Keywords

ellipse, oval, ellipses, ovals, conic sections, section, radius, focus, center, foci, chords, major axis, minor axis, external point, tangents, focal chord, focal radii, tangent line

Galleries

Conic Sections: Ellipses

Source

G.A. Wentworth Plane And Solid Geometry (Boston: Ginn & Company, 1899) 436

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