Eccentricity of the Ellipse
The eccentricity of an ellipse is a number that expresses the degree of roundness of the ellipse.
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c is half of the distance between foci.
a is half of the length of the major axis.

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The eccentricity of an ellipse is a number that expresses the degree of roundness of the ellipse.
![]()
c is half of the distance between foci.
a is half of the length of the major axis.

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