In this paper we report the results obtained when implementing Activities related to the visualization of geometric representations in paper-and-pencil and technological environments with students1 grade 11. This is a qualitative research supported by both the representation theory and the visualization of mathematical objects using technological aid. We discuss how the use of technology promotes learning mathematical concepts through the analysis of static and dynamic geometric figures. Our results show that the technological tool contributes to the visualization of geometric representations arisen from working with Activities; however, paper-and-pencil as a working tool becomes necessary to give rise to conjectures about the meaning of abstract concepts linked to these representations. [This paper is presented in both English and Spanish. For the complete proceedings, see ED583608.]