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  1. Circumcircle - Wikipedia

  2. Circumcircle of a Triangle - Math Open Reference

  3. Circumcircle -- from Wolfram MathWorld

  4. Circumcircle of a Triangle - Math Open Reference

  5. Circumcircle Definition (Illustrated Mathematics Dictionary)

  6. Circumcircle of Triangle Definition (Illustrated Mathematics ...

  7. Circumcircle of a Triangle: Definition, Construction, Formulas