1. The problem statement, all variables and given/known data A movie screen at the front of a room is 9 feet above the ground and 16 feet tall. Determine the distance X you must sit away from the screen in order to maximize your viewing angle. [ I tried to make the picture :P. I need to find X] http://img50.imageshack.us/img50/2781/probwk6.png [Broken] The little fish thing is i believe alpha...i don't know the Greek name for that. 2. Relevant equations Well i figured that i need to do the tangent of both triangles and set them equal to each other, but i am confused if i need to take into account the second triangle for tan of theta. I am comming up empty handed, and what i got was 25/tan[theta] but i don't think its right.