anonymous
  • anonymous
Find the exact circumference of a circle with the given radius. 7 feet C = 7π ft. 14π ft. 27π ft.
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
\[C=2piR\]
anonymous
  • anonymous
don't count and round pi, leave it as variable. 2pi*7 feet=14pi feet
kva1992
  • kva1992
formula for the circumference is C=Dπ so all you do is get the diameter from the radius thus it would be 14πft

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anonymous
  • anonymous
is 2pi ...3.14*2? and multiplied by c?
anonymous
  • anonymous
pi is not multiplied - leave it as variable - this way you will get exact answer. 2pi is multiplied by radius.
kva1992
  • kva1992
in order to find the circumference you multiply Diameter times π and in order to get the diameter you double the radius
anonymous
  • anonymous
oh so its 14pi?
kva1992
  • kva1992
correct
anonymous
  • anonymous
yes it is
anonymous
  • anonymous
wow thnx so much :)

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