Find area of circle if circumference is 16.502

The equation for the circumference of a circle is , where C=circumference and r=radius of the circle.

You are told that the circumference is 16.502. Plug this into the equation for circumference to find the value of r, the radius:
.

Now you know that r = . The equation for the area of a circle is , where A = area and r = radius of the circle.

Since you know the radius, r = , plug that into the equation for area and solve for the area of the circle:


The area of the circle is about 21.670.

Hi there!

To find the area of a circle using the circumference you need to use the following formula:



Now to solve using this formula you need to plug in the circumference that you are given, which is 16.502:



Now square the circumference to get:



Now you want to multiply 4 by π to approximately get:



Now you want to divide 272.316004 by 12.566370 to get:



-Your friend, ASIAX