%0 Journal Article %T The pythagorean theorem based on the Van Hiele model: A didactic proposal for developing mathematical reasoning competences in ninth-grade students of the Educational Institution Anna Vitiello %U http://hdl.handle.net/10584/8580 %K %K Competence, mathematical skills, mathematical reasoning, Pythagorean theorem, Van Hiele Model, collaborative learning. %K %K Competencias; competencia matemática; razonamiento matemático; aprendizaje significativo %K Competencias, competencia matemática, razonamiento matemático, teorema de Pitágoras, modelo de Van Hiele, y aprendizaje colaborativo. %K %~ GOEDOC, SUB GOETTINGEN