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Mathematics 7 Online
OpenStudy (anonymous):

The graph of the equation given below is a circle. What is the length of the radius of the circle? (x - 6)^2 + (y + 5)^2 = 21^2

OpenStudy (mertsj):

Same as before: \[(x-h)^2+(y-k)^2=r^2\] Center is (h,k) and radius is r

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