The radius of a circle is equal to the side length of a square. Given that the area of a square is 3 square decimeters, how many square decimeters is the area of the circle?
Let R be the radius of the circle
Then the area of the square = side length x side length = R & # 178; = 3
Area of circle = 3.14xr & # 178; = 3.14x3 = 9.42 square decimeters
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