SOLUTION: what formula for a perimeter of a sector.eg 120 degree radius 7cm

Algebra ->  Circles -> SOLUTION: what formula for a perimeter of a sector.eg 120 degree radius 7cm      Log On


   

Question 164669: what formula for a perimeter of a sector.eg 120 degree radius 7cm
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
P = r*angle (angle in radians)
------------------
120 degs = 2PI/3 radians
P = 7*2PI/3
P = apx 14.66 cm