Parabola--Distance with Focus and Directrix
- Sue Popelka
- Conic Sections, Parabola
A parabola is the set of points that are equidistant from a point, called the focus (Point A) and a line, called the directrix Move point P to show how these distance are equal. You can also move the directrix and the focus to see how the shape of the parabola changes.