Parallel Tangents to an Ellipse

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Illustration showing that tangents drawn at the ends of any diameter are parallel to each other.

Keywords

ellipse, oval, ellipses, ovals, conic sections, section, radius, focus, center, Parallel, 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) 438

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