Respuesta :

cactus999

C = 2 π r

π = 3.14

2r = diameter

r = 4.5 in

C = 2 × 3.14 × 4.5

C = 28.26

Answer:

28.27433

Step-by-step explanation:

C≈28.27in Diameter

Using the formulas

C=2πr

d=2r

Solving forC

C=πd=π·9≈28.27433in  Diameter