What is the standard form of a circle with center (h,k)(h, k)(h,k) and radius rrr?
(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
x2+y2=r2x^2 + y^2 = r^2x2+y2=r2
h2+k2=r2h^2 + k^2 = r^2h2+k2=r2