Eccentricity is only present in ovals and ellipses. A circle is present. The eccentricity of an oval or ellipse is how linear it is.
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A circle
a circle
A circle is an ellipse with an eccentricity of zero. Both foci of that ellipse are at the same point. In the special case of the circle, that point is called the "center".
Yes; the circle is a special case of an ellipse.
"e" will get greater. The eccentricity for a line is one and for a circle is zero. Since it is getting closer to becoming a line it will go up in value. ; ) "e" will get greater. The eccentricity for a line is one and for a circle is zero. Since it is getting closer to becoming a line it will go up in value. ; )