Question

the radius of a circle is 9 inches. what is the circumference?give the exact answer in simplest form.

Answer 1

Step 1

The circumference of a circle is given by;

`2\pi r`

where;

`\begin{gathered} r=9in \\ \end{gathered}`

Step 2

Find the circumference

`\begin{gathered} C=2*\pi*9 \\ C=18\pi in\text{ches} \end{gathered}`

Hence, in terms of π the circumference of the circle=18πinches