Incorrect. The circumference of a circle is given by the formula $\displaystyle{C}={2}\pi{r}\usepackage{cmbright}\Huge\$ , with $\displaystyle\pi\approx{3.14}\usepackage{cmbright}\Huge\$ . In this circle, $\displaystyle{r}={6}\usepackage{cmbright}\Huge\$ , so $\displaystyle{C}={12}\pi\usepackage{cmbright}\Huge\$ .