hello. I am not sure this is the  correct forum...

I am trying to bend a piece of sheet metal to make 3 sides, a base, one side at 90 degrees and the other at 78 degrees so the two upright pieces intersect for welding. the only tutorials I have found are for 90 degree bends and do not cover how to add a flange that is longer than the original edge. I am able to make the bends and add on a tab to make