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OpenStudy (anonymous):
Suppose the area of a circle is 9TT. What is its diameter?
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OpenStudy (chihiroasleaf):
do you mean the area of the circle is \(9 \pi\) ?
OpenStudy (dtan5457):
Area of circle\[\pi r^2\] If area is 9 pi. Radius must be 3. as \[\pi (3)^2=9\pi \]
OpenStudy (dtan5457):
If the diameter is twice as long as it's radius, and the radius is 3, what's the diameter?
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