Extrude a profile but in 30 degree


Is it possible to continue the extrude of the profile but that will be in 30 degree? I blue lined the desired part in the attached image


The extrude tool has the Direction option for this cases.

How can I use the Base point to represent 30 degree?

A direction is a vector so you need to express 2 point, Base (first) and second.
Just select any couple of points along the direction you want (blue lines) and that’s it.

Select curve
Direction option
Click somewhere
<60 to constrain cursor motion. 60 degrees assuming desired direction is 30 degrees from vertical. (60 = 90 - 30)
Move the cursor in the direction of the desired extrusion and click.