You can
put this solution on YOUR website!circles can be given in the form (x-p)^2+(y-q)^2 = r^2 where (p,q) represent the coordinates of the centre of the circle and r is the radius
your question can be written as (x-0)^2+(y-0)^2=10^2. therefore, your centre is (0,0) and the radius is 10 units