Given:
The radius of circle is r = 13 ft.
The arc length is 19 pi feet.
Explanation:
The formula for the arc length is,
[tex]s=r\theta[/tex]
Here, angle is in radians.
Substitute the values in the formula to determine the measure of angle.
[tex]\begin{gathered} 19\pi=13\cdot\theta \\ \theta=\frac{19\pi}{13} \end{gathered}[/tex]
So angle in radians is,
[tex]\frac{19\pi}{13}\text{ radians}[/tex]
