Pontos notáveis de um triângulo: uma prosposta didática com geometria dinâmica

Abstract

The present article consists in a didactic proposal with the goal of explore the triangle notable points. The exploration tasks are developed in a dynamic geometry environment: the software GeoGebra. Moreover, the proposal explores the mathematical concepts involved through a dynamic that encourages mathematical argumentation and discussion in the classroom. This way, are presented some theoretical reflections about the use of mathematical argumentation in Math classes, and the use of dynamic geometry environments. The research has a qualitative, purposeful and analytical approach. The analyzed data are the tasks that compose the didactic sequence. From the analysis, it was verified that the tasks that compose the didactic proposal favor the exploration of concepts and properties in the study of triangle notable points, and it can contribute for the formation of a space with argumentation culture in Math classes.