Since you didn't state If the 2m was a diameter or radius, it will have to be calculated as If it were both:
Diameter: Pi x D = Area of Circle
3.14 x 2m = 6.28 m²
Radius: Pi x R² = Area of Circle
3.14 x 2m² = 3.14 x 4 = 12.56 m²
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The area of a circle with a radius of 2m is: 12.566 m2
It quadruples. The area of a circle is Pi (about 3.14159) times the radius squared. So if you double the radius (say from 2m to 4m), you area will change from 4*Pi to 16*Pi (4 times what it was originally).
It would be 18 square meters. You find that out by multiplying 9m x 2m. You're welcome :)
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No, no it can't. Circumference = 2r*pi Area = pi*r2 For the area to equal the circumference pi*r2 = pi*2r so divide both sides by pi r2 = 2r so divide both sides by r r = 2 Note that circumference is in units and area is in units squared i.e. radius = 2m, area = 12.56637m2 Ciercumference = 12.56637 m