Question

12 cm Q. What is the circumference of this circle?

Answer 1

The circumference is given by:

$\begin{gathered} C=2\pi r \\ \text{where:} \\ r=radius=\frac{diameter}{2} \\ r=\frac{12}{2}=6 \\ C=2\pi(6)=12\pi \\ C=12\pi \\ or \\ C\approx37.699 \end{gathered}$