SOLUTION: find the central angle of a circle which intercepts an arc 80pie centimeter with the radius of the circle is 20 centimeter. tnx.

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Question 380942: find the central angle of a circle which intercepts an arc 80pie centimeter with the radius of the circle is 20 centimeter. tnx.
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
Use the formula s+=+r%2Atheta. Since theta is unknown, then theta+=+s%2Fr, so theta+=+%2880pi%29%2F20+=+4piradians.