In my own opinion, I don't actually know how the shape of the earth is, maybe flat, round, triangle, I can't actually tell.
But as I was taught in school, I was told that the earth is in form of egg shape, that is in spherical in shape and most people doubted it, that it's round is shape, that is circle in shape. So for me, I believe it's only God who create heaven and earth, it's the one who really knows how the shape of the earth is, because I'm actually confused on how it is because if I look at it, I see different shapes which I can't even tell.