EntityQ4780406· pop 7· linked from 6 articlesApollonius pointSign in to savetriangle center in plane geometryConnectionsProblem of ApolloniusEntityEuclidean geometryEntityApollonius of PergaEntitytangentEntityApollonius' theoremEntityincircle and excircles of a triangleEntitytriangle centerEntitycircles of ApolloniusEntityEncyclopedia of Triangle CentersEntityconcurrent linesEntitytrilinear coordinatesEntityisodynamic pointEntityClark KimberlingEntityCircles of ApolloniusEntityCrux MathematicorumEntityCategoriesTriangle centers