I showed you all my new library on Sunday, and because I could not find the dimensions for this corner arrangement online for anything so I feel obligated to give them here for all future wanters of this Billy corner bookcase setup.
The first iteration of it:
Building this wasn't too terribly hard. This is three white BILLY bookcases from Ikea, two narrow and one small, with corner hardware, and the BILLY all-glass doors which will hopefully keep the dust to a minimum. Here's a step by step along the way, because I took the photos and well, why not?
After the first one it went much quicker because they are all the same.
You can see that because there were no good measurements online and I went for it anyway that there is about two inches of the bookcase protruding into the doorway of the room. It's a wide passage so it doesn't concern me too much.
And this is where I called it a night and left it doorless because the door hanging required me to call in Patrick for his technical assistance.
Then comes the fun part, loading the shelves full! You can probably tell between this photo and the one at the top that I did some more rearranging of the stuff on the shelves. There'll be plenty more of that to come, trust me!
UPDATE: The rightmost shelf hung over into the doorway and I hated it, so I moved the rightmost shelf to the left side, and got a very narrow BENNO bookshelf for the right. It holds DVDs and video games and the like, and it matches. It works much better, and
I'm farther away from high school years than yourself, but I can tell you that that is some weird triangle. The fact that you have two sides (red) which add up to 42", but your remaining side (green) is 50" violates the Triangle Inequality (http://en.wikipedia.org/wiki/Triangle_inequality).
However, I'm a geek, so just ignore me. 8-P
I'm glad to actually get corrected on this! I was measuring by standing on top on a chair and reaching up craning to get measurements. I really do want to get them right though but am not sure how. Perhaps I'll get someone mathier to come help!