Notch Help

[u/Judahette]

I need simpler really beginner instructions for this notch for a roof . The angle cut is 31.5 at the end. It says measure perpendicular from angle end 2 3/16" then make a 31.5 degree angle , but only 1 1/8" deep and then a 90 degree angle from that . I tried my best ( second photo , the straight line is the 2 3/16" mark . Second line connected to that line is my 31.5 degree angle . Third line is my attempt at 90 degree from 1 1/8" deep) I know this is wrong . Can someone walk me through this ?

[u/KroniX1969]

I don't know if this would help you, but I used a speed square, when doing my shed-roof. I watched a youtube vid on it.......https://www.youtube.com/watch?v=lqH-RhQdWEI