In mathematics, an ellipse is a plane curve surrounding two focal points, such that for all points on the curve, the sum of both distances to the two focal points is a constant. It generalizes a …

An ellipse usually looks like a squashed circle ... F is a focus, G is a focus, and together they are called foci. (pronounced fo-sigh)

In mathematics, an ellipse is a closed curve that is symmetric with respect to two perpendicular axes. It can be defined as the set of all points in a plane, such that the sum of the distances …

Dec 24, 2025 · Ellipse, a closed curve, the intersection of a right circular cone (see cone) and a plane that is not parallel to the base, the axis, or an element of the cone. It may be defined as …

Aug 3, 2023 · An ellipse is a closed curved plane formed by a point moving so that the sum of its distance from the two fixed or focal points is always constant. It is formed around two focal …

Apr 27, 2025 · The key features of the ellipse are its center, vertices, co-vertices, foci, and lengths and positions of the major and minor axes. Just as with other equations, we can identify all of …

Things that are in the shape of an ellipse are said to be 'elliptical'. An ellipse is defined by two points, each called a focus. (F1, F2 above). If you take any point on the ellipse, the sum of the …