The problem statement, all variables and given/known data What's the difference between Green's theorem, Gauss divergence theorem and Stoke's theorem? The attempt at a solution I'm struggling to understand when i should apply each of those theorems. Here is what i understand. Please correct my statements below, if needed. Green's theorem is for evaluating the surface area of a region in a 2D plane, bounded by a simple closed curve. Gauss divergence theorem is for evaluating the flux in 3D of a surface bounded by a closed curve. Stoke's theorem is for evaluating the surface area in 3D bounded by a simple closed curve. It's all a bit mixed in my mind, so i'm not sure which theorem to use, but i've been trying to distinguish between those 3 theorems.