The reason I believe that the Earth is round is because of, yes, what I was taught in school, and also from videos I have seen of astronauts in LEO or even further out. All the physics I have been taught throughout life work perfectly with the RE theory (if not out-right fact). There would be no crescent moons if the moon was in fact flat as some here believe, there would be no curvature to the Earth when you go a certain distance up (I have witnessed this myself). If the Earth were flat, where does gravity come from? FEers cannot answer this question, at least IMHO, while today's theories and mathematics explain them perfectly when it comes to the Earth being spherical. How can you fly around the world and back with the Earth being flat and having edges? And in order to pull this conspiracy off, the worlds leaders would have had to keep millions and millions of people over the past 500 years completely silent on the matter, which is extremely extremely extremely unlikely.
Now since I answered the question that I know you would have asked me, answer mine please. Why do you believe the Earth is flat?