SOLUTION: What is the degree measure of a 4 pi-cm arc in a circle of a radius 8 cm?

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Question 948723: What is the degree measure of a 4 pi-cm arc in a circle of a radius 8 cm?
Answer by amarjeeth123(570) About Me  (Show Source):
You can put this solution on YOUR website!
Let the degree measure be x.
Circumference of the circle=2*pi*8
Circumference of the arc=2*pi*8*(x/360)
4 pi=2*pi*8*(x/360)
x=360/4=90 degrees