About Area, Perimeter, Circumference
A simple way to find the perimeter, circumference and area for any shape.
AREA :square millimeter (mm^2); square centimeter (cm^2); square meter (m^2); square kilometer (km^2); square foot (ft^2); square inch (in^2)
LENGTH :millimeter (mm); centimeter (cm); meter (m); kilometer (km); foot (ft); inch(in)
