KnowraEllipseLinked fromLinked fromThe 21 pages that link to Ellipse, each with the reason it gives.All 21Broader topic 9Related 2Narrower topic 5Compared with 5Kepler's laws of planetary motionBroader topic: The first law identifies this curve as the ideal planetary path.Conic sectionBroader topic: An oblique plane cutting one nappe usually produces an ellipse.Orbital eccentricityBroader topic: Bound Keplerian orbits are ellipses, with eccentricity measuring their departure from circularity.Apollonius of PergaBroader topic: Apollonius established the name and geometric treatment of this conic.Focus (geometry)Broader topic: Its two foci jointly determine the defining constant-sum condition.Implicit differentiationBroader topic: Its defining equation can be differentiated directly to find tangent slopes.ConeBroader topic: A plane cuts one nappe of a cone in an ellipse when it is not parallel to a generator.St. Peter's SquareBroader topic: The piazza's oval plan organizes its colonnades around two focal points.Four-vertex theoremBroader topic: A noncircular ellipse has exactly four curvature extrema.