The closer to 100% the circularity is the closer to a prefect circle your drawing is. Circularity = (4 * pi * area) / (perimeter^2) *100% Area = sum of cross products of vectors over two Perimeter = sum of magnitudes of vectors The purpose of this is to demonstrate a method of calculating how close a drawn shape is to a circle (circularity) using maths. It does this by comparing the area of a shape to the perimeter. A circle has the highest area to perimeter ratio, of any polygon.
This is in response to mararocolor's perfect circle game. So, credit to him for the concept.
