Seeing in space is difficult: An approach to 3D geometry through a DGE

In this paper, we present an approach to spatial geometry that involved a group of university students, who engaged in visual experiences while discussing about geometrical properties using a dynamic geometry environment. Drawing on aspects related to the difficulty of seeing in 3D, we introduce suitable connections between quadrilaterals and tetrahedra as a way to enhance visual skills in space geometry. In so doing, we show examples of the way learners manage “to see in space” through the affordances offered by the DGE.