Re: Circles and ellipses

David Cressey wrote:

> The entire discussion about whether a circle is an ellipse hinges on how
> you define circle and ellipse.
>
> If you take the classical definition of an ellipse, from Euclidean
> geometry, defined based on the sum of the distances from each point on the
> ellipse to
> the two foci, then a circle is NOT an ellipse. A circle does not have two
> foci.
>
> I suppose it also depends on what the meaning of the word "is" is.

Gosh. In four years of reading [the Subject lines in] this newsgroup, I certainly never have read this about the Circle/Ellipse non-problem.

Please don't nobody thread this - just use Google Groups if anyone thinks they actually have anything to add.

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