Act 1  My Living Room
Act 2  Exploring the Pythagorean Theorem
We did some practice and then came back to my T.V. the next day.
We started the next day with whiteboards, and I had students write what information we knew and what information we needed to know. I reinforced to students that I did not want to renovate my wall because I am lazy, but I am not too lazy to move my speakers. They said then that we needed to know the height to the shelf. So I gave them this...


Act 3  The Reveal
Sequels (Updated May 27, 2012)
 MeganHeyes golding submitted this awesome picture on 101qs.com. I am sure that any of the questions there will do, but the simplest is: "Is that true?"
 From Karim in the comments there is also this: "What is the largest standard TV (4:3) that could fit in this space?