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OpenStudy (anonymous):
If a circle has a circumference of C, what is the area of the circle in terms of C?
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OpenStudy (anonymous):
area \[circumference=2\Pi.r\]
OpenStudy (anonymous):
area=pi.r^2
OpenStudy (anonymous):
from these two we get \[area=\Pi(circumference)^2\div4\pi^2\]
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