SOLUTION: There is a sector of a circle of radius 9cm and a angle of 80 degrees, Find the perimeter of the sector. Give the answer in terms of pi? Thanks

Algebra ->  Circles -> SOLUTION: There is a sector of a circle of radius 9cm and a angle of 80 degrees, Find the perimeter of the sector. Give the answer in terms of pi? Thanks       Log On


   

Question 439178: There is a sector of a circle of radius 9cm and a angle of 80 degrees, Find the perimeter of the sector. Give the answer in terms of pi? Thanks
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
80%5Eo+%2A%28pi%2F180%5Eo%29+=+%284pi%29%2F9
==> s+=+r%2Atheta+=+9%2A%28%284pi%29%2F9%29+=+4pi, the arc length portion of the sector.
Therefore, perimeter P+=+4pi+%2B+9++%2B+9+=+4pi+%2B18 cm.