Creating Chamfers
To chamfer by specifying chamfer length and angle
- From the Modify menu, choose Chamfer.
- Enter a (Angle).
- Enter the distance from the corner to be chamfered along the first line.
- Enter the chamfer angle.
- Press ENTER to reenter CHAMFER.
- Select the first line and then the second line.
Modify toolbar: 
Command line equivalent: CHAMFER