Freire, Benedito Tadeu VasconcelosFerreira, Maria do Socorro Braz2016-08-242021-10-132016-08-242021-10-132016-07-23https://repositorio.ufrn.br/handle/123456789/43822openAccessRazão, proporção e regra de trêsRatio, proportion and rule of threepostGraduateThesis