Stroke Angle
I am using Illustrator CC (2018) and using the pen tool to create the below image of a triangle with an open bottom. How do I make it so the angle of the stroke is even with the line below (I have only included the line for reference as to what degree of slant I am looking for)? I want to keep the path open at the bottom like it currently is, and want to use strokes, not a fill. I have tried everything I can think of... smart guides, clipping mask, pathfinder, and I am having no luck. Not sure what I'm missing or if there is not a way to do this?

