## Trigonometry (11th Edition) Clone

$s=r\displaystyle \theta\cdot\frac{180^{\mathrm{o}}}{\pi}$
Converting between Degrees and Radians 1. Multiply a degree measure by $\displaystyle \frac{\pi}{180}$ radian and simplify to convert to radians. 2. Multiply a radian measure by $\displaystyle \frac{180^{\mathrm{o}}}{\pi}$ and simplify to convert to degrees. -------- Since $\theta$ is in radians (and we want degrees), we apply case 2. $s=r\displaystyle \theta\cdot\frac{180^{\mathrm{o}}}{\pi}$