Note: At many places i wrote curl (F) writing curl(F) means I want to say curl(F)•k, where k=(0,0,1) and • is a dot product. In this video, we will talk how line Integral and double integrals are related with the help of Green's theorem. We will also see some examples to understand this concept. We will also see how Green's theorem help is to find area of region in xy plane. we will conclude this talk by stating the extended version of Green's theorem.