Answer:
The diameter of the circle is [tex]D=9\ units[/tex]
Step-by-step explanation:
we know that
The circumference of a circle is equal to
[tex]C=\pi D[/tex]
where D is the diameter
we have
[tex]C=9\pi\ units[/tex]
substitute and solve for D
[tex]9\pi=\pi D[/tex]
Simplify
[tex]D=9\ units[/tex]