Me again!
Ok, so I have a system of two equations like so:
xcent = (-1*(2*(y1-y3)ycent-y1^2+y3^2-x1^2+x3^2))/(2(x1-x3));
ycent = (-1*(2*(x1-x3)xcent-x1^2+x3^2-y1^2+y3^2))/(2(y1-y3));
is there any easy way to solve for xcent and ycent in actionscript?