Rolling ellipses of different dimensions to measure their perimeters.

Rolling ellipses of different dimensions to measure their perimeters. The red line is the curve of perimeter versus how squashed the ellipse is. The curve is defined by an elliptic integral, and cannot be expressed with elementary functions.

More:
http://dhushara.com/DarkHeart/QStad/QStad.htm

Work by matthen
http://blog.matthen.com/

#maths #science #geometry