# Explanations, Ellipse

- Author:
- Esther Gruenhut

- Topic:
- Ellipse

## Explanation!

Use the scroll bar in the following applet to unfold the explanation.
Point A is a dynamic point, if you haven't done so before, in stage 6 can move it around.
In stage 7 you can also change the parameters.
also note - Point O in the original applet (which appears here at the bottom of the page) corresponds to point below and point F in the original applet corresponds to

## The original applet

given a circle with center O and F an arbitrary point in it.
for every point A on the circle construct the perpendicular bisector to segment AF.
what happens when we move point A?