Emergency of some geometric knowledge during the solution of a spatial problem

In this study we present the first results of an empirical research in which didactic device has been implemented, in order to test the hypothesis about the emergency of some geometric knowledge in the search of a solution of a spatialproblem type. The addressed spatial problem has consisted in the analysis, design and construction of a container with one liter of capacity. The analysis of some of the dialogues that were presented in the resolution of one of the tasks that were part of this problem, has allowed us, in addition to explicitly evidence the emergence of some geometric knowledge, identify some difficulties in the development of techniques that were used to carry out those tasks.