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OpenStudy (anonymous):
the area of a circle is 20.25pi cm^2. find the diameter.
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Directrix (directrix):
The formula for the area of a circle is this: A = π · r² 20.25 π = π · r² Solve for r. Remember to double the value of r because twice the radius is the diameter. @Johnny_Reyes
OpenStudy (anonymous):
@Directrix does D=9? Thanks
OpenStudy (sleepyhead314):
yes D = 9 @Johnny_Reyes :)
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