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write the standard form of equation

r=2; (h,k)=(0,2)

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Nataliya D. | Patient and effective tutor for your most difficult subject.Patient and effective tutor for your mos...
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A circle centered at (h, k) with radius "r" is given by
(x - h)2 + (y - k)2 = r2    
~~~~~~~~~~~

Here h = 0 , k = 2, r = 2
Thus,
(x – 0)2 + (y – 2)2 = 22 
Or
x2 + (y – 2)2 = 4