EntityQ111207795· pop 5· linked from 5 articlespedial circleSign in to savecircumcircle of the pedal triangleConnectionsnine-point circleEntityMathWorldEntityincircle and excircles of a triangleEntitymidpointEntityEric W. WeissteinEntitySimson lineEntityorthocenterEntityisogonal conjugateEntityincenterEntitypedal triangleEntityPoncelet pointEntityRoss HonsbergerEntitycircumscribed circle for triangleEntityCategoriesCircles defined for a triangle