Posted by Philip on Jul 15, 2018; 8:47pm
URL: https://forum.librecad.org/Resize-a-rectangle-or-create-rectangle-with-specific-dimensions-tp5716174p5716199.html

To create a rectangle with specific dimensions.

From the top menu select Tools/Line/Rectangle.  You are asked to specify the first corner.  You can either click on a point or enter an absolute position in the command line.  Then you are asked to specify the second corner.  To make a rectangle to a specific and precise size enter the relative coordinate in the command line.  @25.24,10.99  would create a rectangle that is exactly 25.24 units wide and 10.99 units tall.  (Units can be inches, feet, meters, millimeter or whatever.)

For CAD it is essential that you understand Cartesian, polar and relative coordinates.  Here is a link to a site that explains the Cartesian system in an easy to understand manner.

https://www.mathsisfun.com/data/cartesian-coordinates.html   

Once you understand Cartesian coordinates the other two are a breeze!