## Geometry: Common Core (15th Edition)

$\frac{9}{64}\pi\ in^2$
To find the area of a circle, we use the formula $A=\pi r^2$ The circle shown has a diameter of $\frac{3}{4}$ in, so its radius is half of that, or $\frac{3}{8}$ in. We plug this value into the formula and simplify: $A=\pi (\frac{3}{8})^2=\pi\times\frac{9}{64}=\frac{9}{64}\pi\ in^2$