We present an analysis of the tasks performed by prospective mathematics teachers during the resolution of the problem. This environment enables us to obtain a multiplicity of cases with a single construction provided geometric properties are used. To address the notion of regular polyhedron, we elaborated a problematic situation mediated by GeoGebra, due to the advantages that this dynamic environment provides when working with three-dimensional figures. We demonstrate it through the design of situations that allow exploration, formulation and validation of conjectures. Numerous regulatory documents express a revaluation of Geometry, not only when working with manipulative materials but also when dynamic geometric software mediates the work.
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