Posted by Rallaz on May 09, 2013; 6:53am
URL: https://forum.librecad.org/distance-along-an-angled-line-tp5708029p5708033.html

pwright2 wrote

I need to identify a point which is 80 inches from the end.  

By trial and error I can find that point with the info, distance point to point.  But, even then, it provides no way to mark the point.   I could do trial and error with aligned dimension, but that is really messy.  I suspect there is a better way but I can't find it.

You are trying to solve a problem of descriptive geometry

From http://en.wikipedia.org/wiki/Circle :
"A circle is a simple shape of Euclidean geometry that is the set of all points in a plane that are a given distance from a given point, the centre. The distance between any of the points and the centre is called the radius."

Generic solution (works with all CAD programs):

Draw a circle with radius 80 inches from the end, the intersection point from circle and line is the one you are looking for.

LC solution:

Use generic solution or simply activate "snap->snap distance"