polygonregular (left) and irregular (right) polygons
pol·y·gon
P0424500 (pŏl′ē-gŏn′)n. A closed plane figure bounded by three or more line segments.[Late Latin polygōnum, from Greek polugōnon, from neuter of Greek polugōnos, polygonal : polu-, poly- + -gōnos, angled; see -gon.]po·lyg′o·nal(pə-lĭg′ə-nəl) adj.po·lyg′o·nal·ly adv.Thesaurus