## Geometry: Common Core (15th Edition)

$452.2\ cm^2$
To find the area of a circle, we use the formula $A=\pi r^2$ $\pi$ is approximately 3.14. The radius (r) is half the diameter(d), so the radius given is 12 cm. Plug the given radius and approximate value of $\pi$ into the formula and simplify: $A=\pi r^2=3.14\times12^2=3.14\times144=452.2$