Respuesta :

circumference of a circle=2πr

area=πr²

1) we calculate the radius of this circle.
Data:
area=9π m²
area=πr²

9π m²=πr²
r²=9π m² / π
r²=9 m²
r=√(9 m²)=3 m

2) we calculate the circumference:
circumference=2πr=2π(3 m)=6π m

Answer: the circumference is 6π m

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