# Ellipse Construction Applet

- Author:
- nmittal

- Topic:
- Ellipse

The point (h,k) is the center. a is the major radius and b is the minor radius.

**If the ellipse is horizontal**, use points**E**and**F**for the foci and lines**and***f***to help with the construction. Activate***g***and***i***to see the segments from the foci to the point on the ellipse. Activate point***j***D**, the point on the ellipse. Now drag point B around the circle and watch the construction.**If the ellipse is vertical**, use points**H**and**I**for the foci and lines**and***m***to help with the construction. Activate***n***and***p***to see the segments from the foci to the point on the ellipse. Activate point***q***. Now drag point***G***around the cirlce to watch the construction.***B*You may use this tool to help you visualize the graphs of the ellipses.