"Mark M. Wilson" <mmw### [at] ncsldcrstatencus> wrote in message
news:3B8### [at] ncsldcrstatencus...
> My only problem with that is that with only two points used, I can think
> of at least THREE possible circles (i.e., with centers at different
> vectors); two points could lie somewhere along either one of two of the
> component semicircles, or the two points could be at either end of a
> diameter of a circle with a different diameter.  Am I clear?
> What I'm thinking is that given THREE coplanar points, only ONE possible
> (coplanar) circle could encompass all three points.   Maybe I'm wrong
> about there being only one such circle?
>
> --Mark

No, you're right - I was thinking sphere.  Sorry. :)

...Chambers

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