Ok, I'm completly perplexed. Where should I post this?
Thread title: Help with wood working dimensions
Thread contents:
If anyone could help me out, I need someone to help me solve for the question marks on my picture below. I'm trying to design a private room that I can build outside and be able to read or whatever else. I've tried every formula I know but I can figure out how to get the question marks.

Just so you know this is just the base of the den. If you need any further help with angles or measurements in the picture just ask.
P.S.: If you wouldn't mind, could you explain to me how you came to that conclusion.