The area of a circle is equal to the perimeter times half the radius.
That is, A = P*r/2
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pi = circumference divided by diameter
If the circumference of a circle is 6.28 then its area is about 3.138 square units
The area of circle with a circumference of 20 is: 31.83 units squared.
The circumference of a circle with an area of 3 acres is: 1,281 feet.
what is the area and circumference of a circle with a diameter of 55 centimeters