EntityQ2190744· pop 10· linked from 17 articlesFeuerbach pointSign in to saveresult on the incircle and nine-point circle of a triangle and the three excirclesConnectionsincircle and excircles of a triangleEntitycircumscribed circle for triangleEntitygeometryEntitytriangleEntitycircleEntityWayback MachineEntitydigital object identifierEntityJSTOROrganizationQ118398Entitynine-point circleEntityMathWorldEntityQ22908627EntitymidpointEntityEric W. WeissteinEntitybarycentric coordinate systemEntitytriangle centerEntityKarl Wilhelm FeuerbachEntityMathematical ReviewsEntityCasey’s theoremEntityautomated theorem provingEntityCategoriesTheorems about triangles and circlesTriangle centers