Conic Section - Parabola
- Phil MacLean
Grab and move point V to reposition the vertex. Slide the value of "p" to change the focal length observe how the parabola changes. Grab and move point A to see how the distance from A to the focus always equals the distance from A to the directrix. Notice that the length of the latus rectum (in green) is always four time the focal length (in purple).