Question 760132
{{{(x-h)^2+(y-k)^2 = r^2}}}  where ({{{h}}}, {{{k}}}) is center and {{{r}}}  radius

if center is ({{{-3))),{{{7}}}) and whose radius is {{{r=1/2}}}, then

{{{(x-(-3))^2+(y-7)^2 =(1/2)^2}}} 

{{{(x+3)^2+(y-7)^2 =1/4}}} 

{{{ drawing( 600, 600, -5, 5, -5, 10,
  grid( 1 ),
  circle(-3, 7, 0.1),
  green( circle( -3, 7, 1/2 ) )
 
) }}}