The circumference is 62.815 units.
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The area of circle with a circumference of 20 is: 31.83 units squared.
The area of a circle that has a circumference of 18 is 25.78 inches squared.
Divide its circumference by 2*pi which will give the radius of the circle. Area of the circle then is pi*radius squared
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The diameter is 4 and its radius is 2 because 2+2 = 4 and 2 squared = 4 Circumference of the circle: pi*4 is the same as pi*2 squared Area of the circle: pi*2 squared