On the Cohomology of spatial polygons in Euclidean spaces

Space of spatial polygons in Euclidean spaces has been studied extensively in[4, 1, 3]. There is a beautiful description of cohomology in [1]. In this paper we introduce another, easy to compute method to obtain the cohomology without using toric variety arguments. We also give an explicit definition to effective cone of moduli spaces of polygons with given side lengths.