How far away from the TV should you sit?

Your mother always told you not to sit too close to the TV. But sitting too far away from a small television is annoying because the picture looks too small. On the other hand, sitting very close to a large television is also not ideal because you can’t focus on the whole thing at once.

Given a television of a certain size, where’s the best place to put the couch? This lesson uses right triangle trigonometry and a rational function to explore the percent of your visual field that is occupied by the area of a television.

*Requires paid membership to access lesson.