Definition of Ellipse
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Description: Diagram of an ellipse that can used to illustrate the definition. "The constant ration between the distances of a point on an ellipse from the focus and the directrix equals the linear eccentricity divided by the semi major axis."
Source: 115
Keywords: conics, cone, conic section, ellipse, ellipses, directrix, focus, foci
Copyright: 2009, Florida Center for Instructional Technology. See license.
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