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5 votes
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

1 Answer

4 votes
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.
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