Question 448898
<pre><font face = "Tohoma" size = 4 color = "indigo"><b> 
Hi
Standard Form of an Equation of a Circle is {{{(x-h)^2 + (y-k)^2 = r^2}}} 
where Pt(h,k) is the center and r is the radius
1. (x+2)^2 + (y-3)^2 = 16  C(-2,3) r = 4
2. (x-8)^2 + (y-5)^2 =1    C(8,5)  r = 0

{{{drawing(300,300,  -10,10,-10,10, grid(1),
circle(-2, 3,0.3),
circle(-2, 3,4),
circle(8, 5,0.3),
circle(8, 5,1),
graph( 300, 300,-10,10,-10,10 ))}}}