Answer:
The radius r = 22.5 cm
Step-by-step explanation:
The formula of a circumference of a circle:
[tex]C=2\pi r[/tex]
r - radius
We have the circumference
[tex]C=45\pi\ cm[/tex]
Substitute:
[tex]2\pi r=45\pi[/tex] divide both sides by π
[tex]2r=45[/tex] dvide both sides by 2
[tex]r=22.5\ cm[/tex]
