Mathematics, 04.11.2020 19:50 eamber646

In the figure, OA = r and OC = R. The sector COB is cut from the circle with center O. The ratio of the area of the sector removed from the whole circle to the area of the sector removed from the inner circle is
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In the figure, OA = r and OC = R. The sector COB is cut from the circle with center O. The ratio of...