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I'm not sure how to do this I gave it a shot but I'm not quite sure it's right

I'm not sure how to do this I gave it a shot but I'm not quite sure it's right
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5 votes
I'm not sure how to do this I gave it a shot but I'm not quite sure it's right

I'm not sure how to do this I gave it a shot but I'm not quite sure it's right-example-1
User Giles Bathgate
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1 Answer

5 votes
The are of the whole circle is
A=pi*r^2
A=81pi

360-220=140 so the shaded area is 140 degrees of the circle
140/360=7/18

81pi*7/18 = 63/2pi

Hope this helps
User Sondes
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8.1k points
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