Edit made on December 16, 2009 by RiderOfGiraffes at 22:45:50
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[[[>50 IMG:Circumcircle.png ]]]
The circumcircle of a triangle is the circle that passes through each of the vertices of the triangle. The centre of the circumcircle, called the circumcentre, is located at the intersection of the perpendicular bisectors of the sides of the triangle.
Enrichment: Can you see why?