Respuesta :

lauralazda1
circumference = 2pi r
r = 1/2 of diameter
= 4.5 cm
so it’s b) 2pi(4.5)
madisonm6096

Answer:

B

Step-by-step explanation:

Formula- [tex]2*\pi * radius\\[/tex]

First, to find the radius u divide 9 by 2 and get 4.5.

Next, you multiply 2 and 3.14 and get 6.28.

Finally, You multiply 4.5 and 6.28 together to get 28.26.

Sorry if this is confusing, this was how I was taught to find the circumference of a circle.

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