Hi and Welcome to AutoCAD Forum,
You can draw those angle lines by many ways ..
- CHAMFER command . >> Click <<
- Draw lines by a specific length .. Enter the at symbol (@) and the length, followed by the left angle bracket (<) and the angle, for example @15<45 .
- Draw lines by a specific angle .. Enter the left angle bracket (<) and the angle, for example <45, and move the cursor to indicate the direction.
Click on below image ...
Imad Habash
The simplest way to draw the circled Line, if from lower left to upper right, is by giving it the start point and then:
@10,10
i.e. a relative X,Y displacement [with running Osnap turned off, of course]. Then you don't need to know the length [which will be irrational, involving the square root of 2], as you would to get it right with @distance<45. If you do it that way with an approximate distance, you'll need to then Fillet it with the upper horizontal Line to get the right length.
Kent Cooper, AIA 
