Find the diameter,radius,and area of a circle that has a circumference of 18π centimeters?

1 Answer
maganbhai P.
Apr 25, 2018

Radius #r=9# cm
Diameter #d=18#cm
Area #A=81pi# #cm^2#

Explanation:

#"circumference of the circle"#=#2pir,where,r=radius#

So,

#2pir=18pi=>r=(18pi)/(2pi)=9#

#i.e.# radius #r=9 # cm

Diameter of circle #=2r=2(9)=18# cm

Area of the circle#A=pir^2=pi(9)^2=81pi# #cm^2#

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