SOLUTION: i need help knowing what formula to use on circles please help me

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Question 309908: i need help knowing what formula to use on circles please help me
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Well the circumference formula is C=2%2Api%2Ar where pi is roughly 3.14159... and 'r' is the radius. This is used to find the distance around a circle.

and the area formula is A=pi%2Ar%5E2 which is used to find the area that a circle encloses.