find the length of a 40 degree arc in a circle with a radius of 4.

Question

A) 8pi

B) 8pi/9

C) 16pi/9

D) 9pi/8

Answer 1

40 degree arc is 40/360 or 1/9 of the whole circle, so the arclength is 1/9 of the Circumference.

 

Knowing that C = 2(pi)radius, you should be come up with the length of the arc.