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OpenStudy (anonymous):
If a circle's circumference is 15 inches, what is its radius? Leave the symbol π in your answer.
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OpenStudy (johnweldon1993):
Well we know the circumference = 2*pi*r If the circumference = 15..this means 15 = 2*pi*r We want to solve for 'r' so lets divide everything by 2pi...this will isolate 'r' on one side 15 r = ----- 2pi
OpenStudy (anonymous):
Thanks !
OpenStudy (johnweldon1993):
No problem!
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