Posted by dellus on
URL: https://forum.librecad.org/construct-geometry-objects-tp5717384p5717386.html

Draw the first line with the known length. Draw a circle with a radius like the length of the second line, centered at the one end of the first line. Then draw a circle with a radius like the length of the third line, centered at the other end of the first line. The intersection point of the circles is the missing corner.



But you can not simply edit the values of an existing triangle.