1. circles that pass through all vertices of a polygon, especially a triangle
Usage: geometry; mathematics

Examples

• The circumcircles of the triangles were drawn using a compass.
• In geometry class, we learned how to construct circumcircles for various triangles.
• The centers of the circumcircles lie at the intersection of perpendicular bisectors.
• Equilateral triangles have circumcircles with centers at their centroids.
• The radius of a triangle’s circumcircle can be calculated using the triangle’s side lengths.
• Students practiced finding the circumcircles of right triangles on graph paper.