Respuesta :

firealpha07

Answer:

diameter=18 in

radius=9 in

area=254.47 in

circumference=56.55 in

Step-by-step explanation:

Key

C=Circumference

D=Diameter

R=Radius

A=Area

π=pi=3.14159265359

Formulas

2r=d

d/2=r

πr^2=a

(2πr)=c

Brainliest Plz