Respuesta :

Answer:

28.27433 in

r = 4.5 in

d = 9 in

c= 28.27433 in

a = 63.6173 in

Answer:

Step-by-step explanation:

Diameter-9

So radius-9/2

Circumference of a circle = 2 pie r= 2 × 22/7 × 9/2

= 28•28

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