Question

Find the Circumference of a circle with a Diameter of 9 inches Group of answer choices 9 pi inches 9 pi inches^2 9 pi inches^3 108 pi inches

Answer 1

Answer:
`9\pi\ in.`

Explanation:

Given

The diameter of a circle is
`d=9\ in.`

So, the radius is
`r=(d)/(2)=4.5\ in.`

The circumference is given by
`2\pi r`

Insert the values

`\Rightarrow 2\pi \cdot 4.5\\\Rightarrow 9\pi \ in.`

Thus, the circumference of the circle is
`9\pi\ in.`