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Re: AC and DE are both diameters of the circle shown below. If the area of [#permalink]
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Attachment:
GRE AC and DE are both diameters .jpg
GRE AC and DE are both diameters .jpg [ 10.85 KiB | Viewed 546 times ]


80 is the sum of the angles in the shaded regions. 280 is the sum of the angles in the UNshaded regions.

Therefore, the 80 is in proportion 2/9 of the entire area of the circle which is 180 units

The shaded regions combined is 40 units
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