Given line j, mark 2 points on the line. Construct congruent circles a and b centered at the points on j. Construct line g through the intersection points of a and b. Construct circle c centered at 1 intersection point of a and b. Mark the 2 intersection points of c and g. Construct congruent circles h and k centered at the points on g. Construct line i through the intersection points of h and k.