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In the figure, if the area of the gray shaded region is $39\pi$ and the area of the green circle is $9\pi$, what will be the length of $AB$?
Geometry
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In the figure, if the area of the gray shaded region is $39\pi$ and the area of the green circle is $9\pi$, what will be the length of $AB$?
barnalidas1974at