The area is 254.5 mm2
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Diameter = 2 x radius = 18 mm .
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
A circle with a radius of 10m has an area of 314.16 m2