Answer:
Step-by-step explanation:
The thing with the arc length formula, s = rt, is that t is the angle in radians. Ours is in degrees, so we have to change it:
36 × [tex]\frac{\pi }{180}=\frac{\pi }{5}[/tex]
So the formula we use to solve for r is:
[tex]12=\frac{\pi }{5}r[/tex]
Multiply both sides by 5 over pi to get that
[tex]r=\frac{60}{\pi } cm[/tex]
