Question

If a circle's circunferencia is 15 inches, what is its radius? Leave the symbol π un tour answer

Answer 1

The answer is 7.5 because you divide the circumference in half. Half of 15 is 7.5.
 

Answer 2

The circumference is pi times the diameter. The diameter is twice the radius.
$Radius=\frac{circumference}{2\pi}=\frac{7.5}{\pi}$
The answer is:
$\frac{7.5}{\pi}$