Question 637848
If you're solving for the circle, then the equation of the circle is {{{highlight((x-11)^2 + (y-6)^2 = 9))}}}.
The center is (11,6) and the length of the radius is 3.

Here's the graph:

{{{drawing(300,300,-2,15,-2,15,grid(1),blue(circle(11,6,3)),green(line(8,-2,8,15)),green(line(14,-2,14,15)),green(line(-2,3,15,3)))}}}