The equation of circle with centre (1,1) and radius 4 is given by (x−1)2 + (y−1)2 = 4
False
The centre of the circle is O(1,1) and radius is 4 units. Let us consider a general point P on the circle. Let the co-ordinates of the point P be (x,y).
PO=4
⇒ √(x−1)2 + (y−1)2 = 4
⇒ (x−1)2 + (y−1)2 = 16 is the equation of the circle.