THIS IS NOT BASED UPON DAPONTES'S MAKE A CIRCLE USING THREE POINTS! I used much different equations. You give the x and y of each the points and it will make a circle that intersect all the points. Tip: If you put the points close to each other or almost in a straight line, it won't work.
OMG!!! CURATED BY P110 ON 8/4/13! Thank you! WOOT!!! MOST LOVED ON 8/5/13! ADDED INTERACTIVITY! It is cleaner in regular, but faster in turbo mode. If you are using regular, wait for the circle to become complete before changing parameters. This is based of off the idea that you can create a unique circle using a triangle.