Question

Given circle Q with a measure of SR=120° and a radius of 9 feet, as shown below.

Determine the arc length of SR Use mathematics to explain how you determined your answer.
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Answer 1

18.85 feet

Explanation:

Determine the arc length of SR

Arc length = θ/360 × 2πr

r = 9 feet

θ =120°

Arc length = 120/360 × 2 × π × 9

= 18.849555922 feet

Approximately = 18.85 feet

Therefore, the arc length of SR = 18.85 feet