Question

Find the length of the arc.

Answer 1

Answer:

1st option

Step-by-step explanation:

The length of the arc is calculated as

arc = circumference of circle × fraction of circle

      = 2πr × $\frac{210}{360}$

      = 2π × 13 × $\frac{21}{36}$

      = 26π × $\frac{7}{12}$

      = $\frac{26\pi (7)}{12}$

      = $\frac{182\pi }{12}$

      = $\frac{91\pi }{6}$