An ellipse is a locus of all the points in a plane, in a way that, the sum of their distances from the two fixed points, also called focus (singular is foci) in the plain, is constant. These focuses are surrounded by the curve. The constant ratio here is called the eccentricity of the ellipse and the fixed line is directrix. Eccentricity is a factor of the ellipse, and it further demonstrates the elongation of the Ellipse. In the next section, we will look at some ellipse formulas.
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