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OpenStudy (kristy):
the diameter of a circle is 9cm.what is the area of the circle use pie
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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
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OpenStudy (anonymous):
pi r ^2
OpenStudy (kristy):
oh okay thanks
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