The radius of a circle is π M. what is the area of the circle

Area s = π × π & # 178; = π & # 179; M2

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1. In a square with a circumference of 12 cm, draw a circle with the side length of the square as the diameter. How many cm is the circumference of the circle? Is that 9.42 cm?
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3. The perimeter of a square is equal to that of a circle. If the side length of a square is known to be 3.14 cm, then the radius of the circle is
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