Hi Elang,

re:
> How about creating circles with 5 mm radius to the endpoints of each line, then
> use these circles to cut the lines? This should too works for arcs, no?

Well whether it works for arcs or not depends on what result you need.

If you need to cut 5mm of "arc length" (distance as traveled like an ant walking along the curved arc), then no that wouldn't work.

If you wanted a result that placed the new arc's endpoint at 5mm "point to point" distance instead of arc length distance then yes that would work.

- Michael