Answers

2014-08-10T14:44:01+08:00
C  = 2πr
r = C/2π
  =  12.56/2π
=    12.56/2* 3.14
=  2 ins
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2014-08-10T16:16:13+08:00
The formula for the circumference of a circle is
C=2rπ
Changing the formula would give us
r=C/2π
r=12.56in ÷ 2(3.14)
 =12.56in ÷ 6.28
r= 2 inches

Then the radius of the circle is 2 inches
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