Question

Find the arc length of a sector that is 125° and has a radius of 20 in.
A. 13.9
B. 43.6
C. 872.2
D. 87.2

Answer 1

125/360 = x / [2 π r]

Answer 2

125/360 = x / [2 π r]

125/360 = x/ [2 π 20]

25/72 = x / 40π

x = 125π / 9 where x represents the arc length

Answer 3

L = r * A where A is in radians
= 20 * 125 * pi
---
180
= 43.63 cm

Answer 4

B. 43.6

Answer 5

C = angle * r; as in 2pi r