Question

Find the arc length of the semicircle

Answer 1

18.8496 units (rounded o1ff to four decimal places)

Explanation:

Arc length = 2 × π × r ×
`(central-angle)/(360)`

r (radius) = 12 units ÷ 2 = 6 units

Central angle = 180°

For our semicircle, the arc length = 2 × π × 6 ×
`(180)/(360)` = 18.8495559215 units

Or 18.8496 units (rounded o1ff to four decimal places)

Answer 2

6pi

Explanation:

hop it helps