Answer:
The radius is 9 cm.
Step-by-step explanation:
The formula for calculating the circumference of a circle is
[tex]C=2\pi r[/tex]
Where r is the radius and C is the circumference.
It was given in the question that; the circumference, [tex]C=18\pi cm[/tex].
We substitute this into the formula to obtain;
[tex]18\pi=2\pi r[/tex]
Divide both sides by [tex]2\pi[/tex]
[tex]\frac{18\pi}{2\pi}=r[/tex]
[tex]9=r[/tex]
The radius is 9cm
