collega aree e circonferenze con i rispettvi raggi
__1. 12,56 m2A. 2 m
__2. 19,625 dm2B. 12 cm
__3. 62,8 dmC. 100 cm
__4. 69,08 dmD. 40 cm
__5. 200,96 cmE. 30 cm
__6. 251,2 cmF. 25 cm
__7. 314 mG. 3,2 dm
__8. 452,16 cm2H. 5 dm
__9. 628 cmI. 1 dm
__10. 2826 cm2J. 11 dm
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