Question 843479
<pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
{{{(x-8)^2 + (y-1)^2 = 9^2}}}
{{{drawing(300,300,   -10,10,-10,10,  arc(8,1,18,18),blue(line(-1,10,-1,-10)) ,
 grid(1),
circle(8, 1,0.4),
graph( 300, 300, -10,10,-10,10))}}}


2. Center lies in the 3rd quadrant
    Tangent to y = -2, x = -10, and the y-axis
{{{(x-5)^2 + (y-7)^2 = 5^2}}}
{{{drawing(300,300,   -12,10,-10,10,  arc(-5,-7,10,10),blue(line(-10,10,-10,-10)) ,
 grid(1),
circle(-5, -7,0.4),
graph( 300, 300, -12,10,-10,10,0,-2))}}}