# Four circles

1) Calculate the circle radius if its area is 400 cm square

2) Calculate the radius of the circle whose circumference is 400 cm.

3) Calculate circle circumference if its area is 400 cm square

4) Calculate the circle's area if the perimeter is 400 cm.

2) Calculate the radius of the circle whose circumference is 400 cm.

3) Calculate circle circumference if its area is 400 cm square

4) Calculate the circle's area if the perimeter is 400 cm.

## Correct answer:

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