Posted by LordOfBikes on Sep 03, 2024; 6:09am
URL: https://forum.librecad.org/Intersection-Precision-tp5725323p5725326.html

Welcome @Helmanfrow!

See https://forum.librecad.org/Bug-with-Line-and-Circle-Intersection-mismatch-on-snap-Intersection-tp5717031p5717032.html

Not sure, if my post applies to your issue. At nearly 45° the offset might not be so much.
You can simply check correctness by selecting or measuring the diagonal line. In the status bar you see the length of selected entities, so when the length of the diagonal equals the radius, the math is correct and the straight lines, including their intersection too.
Then just the circle is not drawn accurately, sadly nothing we can control in LibreCAD.

Armin