# Ellipse/Related Articles

Jump to: navigation, search  Main Article Discussion Related Articles  [?] Bibliography  [?] External Links  [?] Citable Version  [?] A list of Citizendium articles, and planned articles, about Ellipse.
See also changes related to Ellipse, or pages that link to Ellipse or to this page or whose text contains "Ellipse".

## Parent topics

• Conic [r]: A curve obtained as the intersection of a plane with a circular cone; also called second order curve because of its algebraic representation. [e]
• Second order curve [r]: A planar curve defined by a quadratic equation: ax2 + bxy + cy2 + dx + ey + f = 0 in the affine plane, or in the projective plane; also called a conic because of its geometrical generation. [e]

## Other related topics

• Parabola [r]: The planar curve formed by the points that lie as far from a given line (the directrix) as from a given point (the focus). [e]
• Hyperbola [r]: Planar curve formed by the points for which the difference of the distances to two given points is a given number. [e]