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How to write geometries that are perfect circles?

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Hello!

Is anyone out there familiar with writing geometries that are perfect circles (..err should I say arcs?). In one of my scripts I deconstruct, then reconstruct polygon features point by point. It appears that some of my features are perfectly round and only contain two points. So far, I've experimented quite a bit in Arc's Python Window and I've read ESRI's online help here:

http://help.arcgis.com/en/arcgisdesk...0000001v000000

...but still stuck. Is there a trick to writing perfectly round polygon features that I'm missing? If anyone out there has any advice it'd be greatly appreciated.

Please note that I'm restricted to ArcGIS for Desktop 10.0 and Python 2.6. Thanks!

- Nick

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