An ellipse has two points to make it............a circle only one.......

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   2. In mathematics, an ellipse is a curve on a plane surrounding two focal points such that the sum of the distances to the two focal points is constant for every point on the curve.

   3. Ellipse - Wikipedia, the free encyclopedia

      https://en.wikipedia.org/wiki/Ellipse

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Ellipse - Wikipedia, the free encyclopedia

https://en.wikipedia.org/wiki/Ellipse

Wikipedia

In mathematics, an ellipse is a curve on a plane surrounding two focal points such that the sum of the distances to the two focal points is constant for every point on the curve.

‎Derivation of the Cartesian ... - ‎Ellipse (disambiguation) - ‎Superellipse - ‎N-ellipse

Ellipse -- from Wolfram MathWorld

mathworld.wolfram.com › ... › Plane Curves › Conic Sections

MathWorld

The ellipse is a conic section and a Lissajous curve. An ellipse can be specified in the Wolfram Language using Circle[ x, y , a, b ]. If the endpoints of a segment are moved along two intersecting lines, a fixed point on the segment (or on the line that prolongs it) describes an arc of an ellipse.

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Conics: Ellipses: Introduction - Purplemath

www.purplemath.com/modules/ellipse.htm

An ellipse, informally, is an oval or a "squished" circle. In "primitive" geometrical terms, an ellipse is the figure you can draw in the sand by the following process: ..