Definition of "circumcircle" [circumcircle]

• A circle that passes through every vertex of a given triangle (or other polygon where possible) (noun)

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• "←→ ←→ In Figure 5.24, point P is on the circumcircle of ABC."
• "Begin by considering the circumcircle of ABC (see Figure 6.5)."
• "For example, the perpendiculars drawn to the three sides of a triangle from any point on its circumcircle intersect the sides in three collinear points (Simson's invariant)."