An ellipse is a shape like a flattened circle.
An ellipse has some important dimensions: the major axis and the minor axis, which when halved give the semi-major axis and semi-minor axis. It also has an area, which is the amount of space contained by an ellipse.

About This Widget

This widget allows you to find the semi-major axis, semi-minor axis, major axis, minor axis and area of an ellipse.
Draw an ellipse by:

Clicking on the canvas, or

Entering both the semi-major and semi-minor axis or the major and minor axis.