Step 3: Area of the circles
pi x r2
So in simple terms, (special ratio number) multiplied by the radius
of the circle that is squared.
Squared means the number multiplied by itself
*hehe, it is also the anti derivative of perimeter of a circle...co-incidence or is it?
For curious people the next step is a simple lesson on pi (video no reading, yeah!)
Radius, the point from the middle of circle to the outside