[tex]\bf \begin{array}{llll}
\textit{area of the}\\
\textit{segment of a circle}
\end{array}=\cfrac{r^2}{2}\left( \cfrac{\pi \theta}{180}\ - \ sin(\theta) \right)\qquad
\begin{cases}
r=radius\\
\theta=\textit{angle in degrees}
\end{cases}[/tex]
when taking the sine, make sure your calculator is in Degree mode, as opposed
to Radian mode, since the angle in this case, is in degrees
