This was kind of neat. The website showed a variety of different shapes and the equation of each shape. This could be useful for teachers in showing what each shape actually looks like and the equation used to get that shape.
The only usefulness of this website is showing shapes and their equations. There is a interaction by seeing things like the inverse, the evolute and pedal, but it doesn't show how that was formed. So only good thing really is it shows you the shape and the equation.