Copy of How to construct a parabola
Given is a line  and a point , not on . A parabola is the set of all points in the plane that are equidistant from  (the focus) and  (the directrix).
- Drag the blue point M along the directrix to create points from the parabola.
- Click the checkbox to see the construction.
- Drag the Focus and the Directrix to change the parabola.