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Mathematics 8 Online
OpenStudy (kristy):

the diameter of a circle is 9cm.what is the area of the circle use pie

OpenStudy (anonymous):

(9/2)^2 pi

OpenStudy (anonymous):

since your r is in diameter use diameter/2

OpenStudy (kristy):

so 28.3

OpenStudy (anonymous):

63.617

OpenStudy (anonymous):

((9/2)^2) * pi

OpenStudy (anonymous):

pi r ^2

OpenStudy (kristy):

oh okay thanks

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