In the toolBox Modify there is the button "Trim to intersection" similar than FILLET in AutoCAD.

I would like to see some new parameters in the tool settings dialog such as:

checkbox (Join elements)

Vertex= combobox (Sharp / Rounded/ Chamfered) as "Modify Element" tool has.

the command Fillet in AutoCAD join automatically both elements and if Radius is not 0 we can put an arc.