EntityQ7457534· pop 10· linked from 5 articlesseven circles theoremSign in to saveabout a chain of six circles tangent to a seventh circle and each to its 2 neighborsConnectionsgeometryEntityInternational Standard Book NumberEntitycircleEntitylineEntityWayback MachineEntitypointEntitydigital object identifierEntityplaneEntitytangentEntityJSTOROrganizationMathWorldEntityQ22908627EntityEric W. WeissteinEntityBrianchon's theoremEntityAlexander BogomolnyEntityCategories7 (number)Theorems about circles