The equation of a circle c, with centre o, is:
x2 + y2 = 225
(a) find the coordinates of the centre o.
(b) find the radius of c.

a) The center coordinates O is  (0,0)

b) The radius C = 15

Step-by-step explanation:

The given equation of the circle is :

Now, general form of the equation of the circle is:

where (h,k) are the center co -ordinates and r is the radius of the circle.

Comparing the general equation with the given equation, we get

So, here the center coordinates (h,k) = (0,0)

And the radius of the given circle is r = 15