Question

Find s, which is the length of arcWV on OC.

Answer 1

C

Explanation:

The arc length s is calculated as

s = circumference × fraction of circle

= 2πr ×
`((7\pi )/(9) )/(2\pi )`

= 2π × 18 ×
`((7\pi )/(9) )/(2\pi )`

Cancel the 2π on numerator/ denominator

= 18 ×
`(7\pi )/(9)` = 2 × 7π = 14π → C