A = Pi·442 ≈ 6,082.12cm2
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The circumference of a circle with a 7cm radius is 44cm. The area is 154cm2
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The area of a circle if the radius is 9m 254.5m2
The radius of a circle with the area of 36 is 3.385
The area of a circle with a radius of 2m is: 12.566 m2