Concept information
Terme préférentiel
parabola
Définition(s)
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In mathematics, a parabola is a plane curve which is mirror-symmetrical and is approximately U-shaped. It fits several superficially different mathematical descriptions, which can all be proved to define exactly the same curves. One description of a parabola involves a point (the focus) and a line (the directrix). The focus does not lie on the directrix. The parabola is the locus of points in that plane that are equidistant from the directrix and the focus. Another description of a parabola is as a conic section, created from the intersection of a right circular conical surface and a plane parallel to another plane that is tangential to the conical surface.
(Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Parabola)
Concept(s) générique(s)
Traductions
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français
URI
http://data.loterre.fr/ark:/67375/PSR-NNMK3603-N
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