Chamfer

Bevel the corner of 2 objects



Distance option

Home tab > Modify panel > Chamfer



Command line: Distance



Specify 1st chamfer distance: 200



Specify 2nd chamfer distance: 100



Selct 1st line



Select 2nd line

Angle option



Start Chamfer command
Command line: Angle



Specify chamfer length: 200



Specify chamfer angle: 30



Select 1st line



Select 2nd line