Is there an addon that will extrude perpendicular to an objects face or edges?

Is there not a function or addon that will extruc
de edges pependicular to the edges or face.? In the bottom picture I had to approximate the extrude manually. I need something precise. Thanks


Transform orientation = Ctrl+Alt+space, Extrude that direction.
or use custom orientations
or temporary faces

Thanks Juha and thanks {--}! I will mark this as a favorite. Juha’s method works for now. I will have to check out {--} links later.