## Elementary Algebra

$64\pi \space cm^2$
The circle's circumference is $16\pi$ and the formula for the circumference is $d\pi$ or $2r\pi$. That means the diameter of the circle is 16 and the radius is 8. The formula for the area of a circle is $\pi r^2$, and plugging in the radius gives: $\pi 8^2 = 64\pi$ centimeters squared