EntityQ4461560· pop 7· linked from 4 articlesPoncelet pointSign in to savepoint defined in a quadrangleConnectionsgeometryEntityInternational Standard Book NumberEntitypointEntityhyperbolaEntitynine-point circleEntitycyclic quadrilateralEntitycollinearityEntitySimson lineEntitycoplanarityEntitypedal triangleEntityorthocentric systemEntitycircumscribed circle for triangleEntityCategoriesEuclidean plane geometry