Respuesta :
[tex]\bf \textit{arc's length}\\\\
s=\cfrac{r\theta \pi }{180}\qquad
\begin{cases}
r=radius\\
\theta =angle~in\\
\qquad degrees\\
------\\
r=5\\
\theta = 42
\end{cases}\implies s=\cfrac{5\cdot 42\cdot \pi }{180}[/tex]
