Uma proposta de ensino por meio do software geogebra: possibilidades no ensino e aprendizagem da trigonometria no triângulo retângulo

Abstract

The present work was developed aiming at proposing reflections about the use of digital technologies for well defined purposes and in consonance with the specificities of certain mathematical contents. This research refers to a case study concerning the application of a didactic proposal with emphasis on the concept of tangent of an acute angle, within the topic of trigonometry in the triangle rectangle. The present research was developed in the subject Supervised Stage IV of the Course of Mathematics Degree of the Pontal Integrated Sciences Faculty (FACIP), currently Pontal Exact and Natural Sciences Institute (ICENP), Federal University of Uberlândia (UFU). Its application took place at the Federal Institute of the Triângulo Mineiro (IFTM) in Ituiutaba / MG, under the coordination of the Mathematics Tutorial Education Program (PET Mathematics Pontal), in the second half of 2016. In all, four activities were carried out, all developed within the perspective of exploration and research using the Digital Technologies (TD) aimed at the teaching and learning of Trigonometry in the triangle rectangle. The results obtained point out that it is easier for students to deduce, conjecture and generalize certain concepts from their interaction with GeoGebra software. In this context, the present research also proposes an analysis of the potentialities of this software allied to investigative activities, as several authors have argued about the subject.