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  1. Ellipse - Wikipedia

    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 …

  2. Ellipse - Equation, Formula, Properties, Graphing - Cuemath

    Here we shall aim at knowing the definition of an ellipse, the derivation of the equation of an ellipse, and the different standard forms of equations of the ellipse.

  3. ELLIPSE Definition & Meaning - Merriam-Webster

    A closed curve consisting of points whose distances from each of two fixed points (foci) all add up to the same value is an ellipse. The midpoint between the foci is the center. One property of …

  4. Ellipse – Definition, Parts, Equation, and Diagrams

    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 …

  5. Ellipse - Math is Fun

    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)

  6. Ellipse | Definition, Properties & Equations | Britannica

    Oct 6, 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.

  7. Ellipse -- from Wolfram MathWorld

    Nov 14, 2025 · The ellipse is a conic section and a Lissajous curve. An ellipse can be specified in the Wolfram Language using Circle [x, y, a, b]. If the endpoints of a segment are moved along …

  8. Ellipses - Definition, Equations, Types, Properties and ...

    So, what exactly is an ellipse? How do we define its equation mathematically? And what makes it different from a circle or a parabola? An ellipse is the set of all points in a plane such that the …

  9. Equations of Ellipses | College Algebra - Lumen Learning

    An ellipse is the set of all points (x, y) in a plane such that the sum of their distances from two fixed points is a constant. Each fixed point is called a focus (plural: foci) of the ellipse.

  10. Khan Academy

    Khan Academy ... Khan Academy