Respuesta :

Answer:

area is Pi x radius squared

Step-by-step explanation:

radius is half the diameter which is the line from one side of the circles to the opposite side
9. 452.4 ft
10. 314.2 cm
11. 201.1 m
12. 12.6 m
13. 314.2 yd
14. 907.9 ft

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good job