You can put this solution on YOUR website! To write the answer in terms of pi means NOT to use 3.14 for pi.
Circumference formula:
C = pi times diameter
You were given the radius to be 5 cm.
The diameter is TWICE the radius or 10 cm.
C = 10pi
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The area of a circle is given by A = pi(r^2).
Just plug and chug.
A = pi(5^2)
A = 25pi