HOW can this be so hard?? Please help my brain understand how to measure and cope this joint Finishing (This is an

HOW can this be so hard?? Please help my brain understand how to measure and cope this joint

Finishing (This is an angled roof/ceiling to a wall)

https://preview.redd.it/t0y1eqricxoa1.jpg?width=640&crop=smart&auto=webp&v=enabled&s=c8c52ec698a5616cc5de4b72a74c4e81aa74f74b

https://www.reddit.com/r/woodworking/comments/11wgtvq/how\_can\_this\_be\_so\_hard\_please\_help\_my\_brain/?utm\_source=share&utm\_medium=web2x&context=3

#stolarstwo