The circumference is the perimeter of a circle. It is a length and so is measured in \(mm\), \(cm\), \(m\) or \(km\). An area is measured in square units: \(mm^{2 ...

D shows the circumference. This is the perimeter of the circle, the distance around the shape. Substitute the value of the radius into the formula. Multiply 2 by π then multiply by the radius, ...