EntityQ782891· pop 9· linked from 8 articlesJohnson circlesSign in to savegeometric theorem regarding 3 circles intersecting at a pointConnectionsmedial triangleEntityorthocenterEntitycircumscribed circle for triangleEntityRomaniaCountrygeometryEntitycircleEntityWayback MachineEntityradiusEntitycongruenceEntitysimilarityEntitycircumscribed circleEntitynine-point circleEntityEuler lineEntityhomothetic transformationEntityMathWorldEntityaltitudeEntityEric W. WeissteinEntitypoint reflectionEntityEncyclopedia of Triangle CentersEntitybisectionEntityCategoriesCirclesTriangle geometry