write the standard form of equation

Question

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

Answer 1

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