Category:Definitions/Parabolas

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This category contains definitions related to Parabolas.
Related results can be found in Category:Parabolas.


ParabolaFocusDirectrix.png


Let $D$ be a straight line.

Let $F$ be a point.


Let $K$ be the locus of points $P$ such that the distance $p$ from $P$ to $D$ equals the distance $q$ from $P$ to $F$:

$p = q$


Then $K$ is a parabola.