SAIDI, HarounSupervisor: Mihoubi, D.2022-07-142022-07-142022-06-10https://repository.univ-msila.dz/handle/123456789/30383In this project, we present the applications of planar graphs in determining the number and shape of regular polyhedra, in addition to thier use in solving some mathematical problems such as the five-color problemenplanar graphs : trees : Euler’s Formula : Regular polyhedra : The five colours problemThesis