What is the area of a 2m circle?

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