circle o has a circumference of 36π cm. what is the length of the radius, r? 6 cm 18 cm 36 cm 72 cm

Explanation:

Step1: Recall the 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 the given value

We know that $C=36\pi$, so $36\pi=2\pi r$.

Step3: Solve for $r$

Divide both sides of the equation $36\pi = 2\pi r$ by $2\pi$. We get $r=\frac{36\pi}{2\pi}=18$.

Answer:

18 cm