What is the standard form of a circle centered at (h,k)(h, k)(h,k) with radius rrr?
x2+y2=r2x^2 + y^2 = r^2x2+y2=r2
(x+h)2+(y+k)2=r2(x+h)^2 + (y+k)^2 = r^2(x+h)2+(y+k)2=r2
(x−h)2+(y−k)2=r2(x-h)^2 + (y-k)^2 = r^2(x−h)2+(y−k)2=r2
(x−h)2+(y−k)2=r(x-h)^2 + (y-k)^2 = r(x−h)2+(y−k)2=r