Hi. I'm from singapore. I'm now interested in maths. I only studied till secondary school(high school) I wasn't interested in maths then. Now I am. I read maths book written by David Berlinski , John allen paulos and others to try to understand. I do not have mathematician friends so I couldn't ask them. I like to ask about Eculid fifth postulate. As you all know its something like there is a line L and a point P. One can draw only a line through P that is parellel to L. I wonder if the fifth postulate applies to surfaces that are not flat like say a sphere? I think its possible but the books I read suggest otherwise. (Maybe its due to my lack of knowledge in math) Can someone explain to me? Thanks.