Rebuild the shape with the pentool? That is a lot of work
Even with the points almost perfect (I converted to path and checked the position of the point; the x value has a difference of 0.01), there is a gap after rotating the second segment consisting of (0 and x) with x degrees.
I think the only way to have it perfect is to duplicate the circle and enter the angles manually. A lot of work for 20 segments
test.gvdesign (2.0 KB)