SOLUTION: Find the circumference of a circle with the area 36pi square centimeters?

Question 94092: Find the circumference of a circle with the area 36pi square centimeters?
Found 2 solutions by checkley75, praseenakos@yahoo.com:
Answer by checkley75(3666) (Show Source): You can put this solution on YOUR website!
AREA=PIR^2
AREA=PI*6*6 THUS THE RADIUS IS 6 CM.
CIRCUMFERANCE=2PIR
C=2*3.14*6
C=37.68 CM. ANSWER.
Answer by praseenakos@yahoo.com(507) (Show Source): You can put this solution on YOUR website!
Question:
Find the circumference of a circle with the area 36pi square centimeters?

Answer:

Area of circle is given by the formula, A = , where A is the area and r is the radius of the circle.

Here, A = 36 pie

==>

Divide both sides of the expression by

==>

==>

Take square root on both sides...

==>

==> r = 6 or -6

Since radius can never be negative, you can take r = 6

So, radius = 6

Now circumference of a circle is given by the formula,

So circumference =

==>
--------------------------------------------

If you put the approximate value of pie ( its or you will get

Circumference =
That is, circumference =

Hope you found the explanation useful.

Regards.

Praseena.

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