Category:Definitions/Parabolas

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

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.