- http://www.disfrutalasmatematicas.com/geometria/poligonos-regulares.html
- https://www.google.cl/url?sa=t&rct=j&q=&esrc=s&source=web&cd=7&cad=rja&uact=8&sqi=2&ved=0CEoQFjAG&url=http%3A%2F%2Fwww.educarchile.cl%2FP0001%2FFile%2FPOLIGONOS_AB.ppt&ei=VdKRU9f5N9DgsAS4pILQBQ&usg=AFQjCNEoDUg9eOOr-EH_tMJwKUmT6JHPTw&bvm=bv.68445247,d.cWc