Posted by stranger573 on Mar 13, 2015; 9:58am
URL: https://forum.librecad.org/Isometric-Circles-tp5711165p5711185.html

Mike Hayes wrote

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So I'm guessing the code behind the tool is already doing something extra to create a unique solution. Perhaps it is making the ellipse touch the midpoints of the four selected lines?
...

The area of the inscribed ellipse (and other objects) should be the maximum. For this there is only one solution.
I believe that this is a solution for isometric circles too.

Midpoint is not good idea. Example: