Question

If the movie screen was inclined such that the angle between the horizontal and the plane of the screen itself is 80 degrees, find the viewing angle for a person sitting on a chair of average size that is 12m horizontally form the front wall of th cinema. Assume that the 6m x6m screens starts 2m up the the vertical font wall. A clearly labelled diagram as well as a well - justified solution is expected. Write any assumptions made.