EntityQ619776· pop 27· linked from 326 articlesconcentricSign in to saveGeometric objects with a common centreConnectionsHomoeoidEntitycircumscribed circle for triangleEntitygeometryEntityJohannes KeplerEntityInternational Standard Book NumberEntitycircleEntitysphereEntitycylinderEntityglobeEntityhistologyEntityplaneEntityG.H. HardyEntityequilateral triangleEntitygreat circleEntitydendrochronologyEntitycoaxial cableEntityspiralEntityregular polygonEntityif and only ifEntitycenterEntityCategoriesCorrosion preventionGeometric centersVisual motifs