Ellipse+in+a+Box

The figure shows an ellipse enclosed in a rectangle. Drag the point or press Play to see the other rectangles that can enclose the ellipse. What do you observe? (Hint: click Trace.) You can use the sliders to change the dimensions of the ellipse.

media type="custom" key="11276874"

Download: [|ellipse_in_a_box.ggb]