SOLUTION: the circumference of a circle is 14.5cm a) calculate the diameter of the circle b) calculate the radius of the circle c) calculate the area of the cirle

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Question 189686: the circumference of a circle is 14.5cm
a) calculate the diameter of the circle
b) calculate the radius of the circle
c) calculate the area of the cirle
Answer by user_dude2008(1825) About Me  (Show Source):
You can put this solution on YOUR website!
a) calculate the diameter of the circle


C=2*pi*r

14.5=2*3.14*r

14.5/(2*3.14)=r

14.5/(6.28)=r

2.31=r

r=2.31

diameter: d=2*r=2(2.31)=4.62

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b) from part a) radius: r=2.31

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c)
Area:
A=pi*r^2

A=(3.14)(2.31)^2

A=(3.14)(5.3361)

A=16.755