A typo in my earlier mesage Equation (1) is to be corrected as g^2 + f^2 - c = [(h/2)+(d^2/8h)]^2 Vijayaprasad > Hi, > I need some help, please. > I have : > - an circle arc AB > - x1,y1,x2,y2 - coordonates of A(x1,y1) and > nd B(x2,y2). > - h - height of arc > - d - lenght of line segment AB > I want to know the coordonates of the circle. > > Thanks a lot. > PS : I don't speek english very good.