SOLUTION: whats the area of a sector in a circle if the circle has radius 4 cm and the arc has a measure of 120 degrees?

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Question 4505: whats the area of a sector in a circle if the circle has radius 4 cm and the arc has a measure of 120 degrees?
Found 2 solutions by pushpaharan, rapaljer:
Answer by pushpaharan(47) About Me  (Show Source):
You can put this solution on YOUR website!
area of a circle = pi * r^2
whole circle = 360
an arc has 120 = 120/360 * pi*r^2 =5.33 cm^2

Answer by rapaljer(4671) About Me  (Show Source):
You can put this solution on YOUR website!
In the posted solution to this problem by pushpaharan, I think pi was left out of the final answer.

Since the 120 degrees is 1%2F3 of the full circle,
Area+=+%281%2F3%29+%2A+pi%2A+%28r%5E2%29+, where r=4 cm, and pi is approximately 3.14,
Area+=+%281%2F3%29+%2A+%28pi%29+%2A+16, approximately 16.75.

R^2 at SCC