> Not more easy to draw just a "perpendicular vertical helper" by the center of the
> line and draw the 3 pts arc by Start On End ? ;)

Hi Pilou, that's easy, but it will create a different type of shape. The one that I drew has end tangents that point straight vertically downward.

If you draw an arc like you mention, it won't generally have end tangents that point down, except for one arc at the exact right height.

- Michael