KnowraFocus (geometry)Linked fromLinked fromThe 12 pages that link to Focus (geometry), each with the reason it gives.All 12Broader topic 3Related 9EllipseBroader topic: The two fixed points in the ellipse’s constant-distance-sum definition.Kepler's first lawBroader topic: The Sun occupies one of the ellipse’s defining points.Marden's theoremBroader topic: The theorem locates the derivative zeros as the two foci of the inellipse.