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OpenStudy (anonymous):
In a circle, a 90(degree) sector has an area of 36pi in^2. What is the radius of this circle?
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OpenStudy (anonymous):
since it is 90 degrees, it is a quarter of the area of the whole scircle area = pi(r^2)/4 36 pi = pi (r^2)/4 pi cancels 144 = r^2 r = 12
OpenStudy (anonymous):
Thank you @jkasper !
OpenStudy (anonymous):
no problem
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