KnowraPoncelet's closure theoremLinked fromLinked fromThe 2 pages that link to Poncelet's closure theorem, each with the reason it gives.All 2Broader topic 1Related 1Jean-Victor PonceletBroader topic: This named result captures the striking closure phenomenon in his conic geometry.Steiner conicRelated: It is a related projective conic phenomenon built from correspondence and incidence.