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

For r = 20 in;  α = 125°;
the arc length is:
l = (  r π α ) / 180°
l = ( 20 · 3.14 · 125° ) / 180° 
l = 7,850 / 180
l = 43.611 ≈ 43.6
Answer: B ) 43.6 in.