Posted by dellus on Jan 13, 2022; 12:08pm
URL: https://forum.librecad.org/Center-Point-Angles-Tool-using-cord-tp5721333p5721345.html

I haven't found out either how to do it. I think the feature is incomplete in the code and the developer might have left "or [angle/cord length]" in the prompt as a reminder that something remains to be done.
I have opened an issue at github, with the proposal to either fix it or remove the according text part.