Question

Find the radius of this circle!

Answer 1

r=5

Explanation:

`\theta=(2\pi )/(3)\\l=(10\pi )/(3)\\\theta=(l)/(r)\\r=(l)/(\theta ) \\r=((10 \pi )/(3) )/((2\pi )/(3) ) \\or~r=(10\pi )/(3) *(3)/(2\pi ) =5`