center (2,-8); r=9
center(0,0); r=4
center(-1,-1); r=1
I Will "Thumbs Up" Any or All Answers Since they Will Most Likely be Better Than Mine :)
-much appreciation! Natasza
You should rely on the formula of a circle that looks as (x−xcenter)2+(y−ycenter)2=R2,
where the center of a circle has coordinates (xcenter;ycenter), any point of the coordinate system has coordinate (x;y), R is radius. Good luck!