Question

Find the center of the circle whose equation is x² + y² = 4.

(0, 0)
(1, 1)
(2, 2)

Answer 1

When we place a circle at the centre of a coordinate system, its equation is \[x^{2} + y^{2} = r^{2}\]

Answer 2

Which means (h,k) is (0,0)