Scaled arcs do not appear correctly

[mogest]

As reported by @Nowass in #85.

[Nowass]

Hi @mogest, since I reported this issue already a quite long time ago, I would like to ask when do you think this issue could be fixed? it's quite annoying to draw pictures where elements can't be scaled ...

[mogest]

I looked into it and it was difficult. Given this issue has sat here with no plus ones for almost a year, it's probably reasonably infrequently occurring. If you're able to fix it and submit a PR, the community would appreciate your contribution.