Question

the circumference of a circle is 18π inches. what is the radius? c = 18π in give the exact answer in simplest form. inches

Explanation:

Step1: Recall circle - circumference formula

The formula for the circumference of a circle is $C = 2\pi r$, where $C$ is the circumference and $r$ is the radius.

Step2: Substitute given value and solve for $r$

We are given that $C=18\pi$. Substituting into the formula $18\pi=2\pi r$. Divide both sides of the equation by $2\pi$: $\frac{18\pi}{2\pi}=r$. Simplifying the left - hand side, $\frac{18}{2}=r$.

Answer:

9