Ellipse/Related Articles

See also changes related to Ellipse, or pages that link to Ellipse or to this page or whose text contains "Ellipse".

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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 $\sum _{i,j=0}^{2}a_{ij}x_{i}x_{j}=0$  in the projective plane; also called a conic because of its geometrical generation. ^[e]

Subtopics

• Circle (geometry) [r]: Add brief definition or description

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]

• Cone (geometry) [r]: Add brief definition or description

• Second order surface [r]: Add brief definition or description

• Kepler's first law [r]: Planets move on paths that are ellipses which have the sun as a focus. ^[e]