find the length of a 40 degree arc in a circle with a radius of 4. A) 8pi B) 8pi/9 C) 16pi/9 D) 9pi/8

Question

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

A) 8pi

B) 8pi/9

C) 16pi/9

D) 9pi/8

Answer 1

radius 4 means circumference of 8pi

40 degree arc has length = 40/360 = 1/9 of the circumference

8pi/9 = the length of the arc

B) is correct