Conic section
In mathematics, a conic section (or just conic) is a curved locus of points, formed by intersecting a cone with a plane. The conic sections were named and studied as long ago as 200 BC, when Apollonius of Perga undertook a systematic study of their properties.
Dandelin spheres
See Dandelin spheres for a short elementary argument showing that the characterization of these curves as intersections of a plane with a cone is equivalent to the characterization in terms of foci, or of a focus and a directrix.
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~ Table of Content ~
| ► | Introduction |
| ► | Types of conics |
| ► | Semi-latus rectum and polar coordinates |
| ► | Properties |
| ► | Applications |
| ► | Dandelin spheres |
| ► | Derivation |
| ► | See also |
| ► | External links |
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