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[[Image:Parabola.png|right|thumb|pxl=200|various parabolas]]
A '''parabola''' is a curve on a plane, consisting of all the points that are equidistant from a point called the ''focus'' and a line, called the ''directrix''.
A '''parabola''' is a curve on a plane, consisting of all the points that are equidistant from a point called the ''focus'' and a line, called the ''directrix''.