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OpenStudy (kj4uts):
1. In a circle of radius 20, find the length of the arc spanned by a central angle of pi/8 radians. Round your answer to 2 decimal places. Use 3.1416 as an approximation for pi.
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OpenStudy (kj4uts):
I think this is how you solve it: 20(1/8pi) = 7.85
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