Find the equation of the circle with centre (0,2) and radius 2.
Find the equation of the circle with centre (0,2) and radius 2.
Here h = 0, k = 2 and y = 2. Therefore, the required equation of the circle is
(x – 0)2 = (y – 2)2 = (2)2
or x2 + y2 – 4y + 4 = 4
or 9; 9;
x2 + y2 – 4y + 4 = 4.
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), passing through (2, 3)
and radius 
.