Construção de triangulos retângulos e suas relações trigonométricas com o auxílio do GeoGebra em uma turma de ensino médio

Abstract

The present work brings the presentation of an unprecedented didactic proposal, for the author. The application was carried out in a group of the 2nd year of high school, from a school in the state education network of Rio Grande do Sul, in the municipality of Hulha Negra. The objective was to answer the following problem: How can we introduce the notions of trigonometric relations in a high school class based on demonstrations carried out in the GeoGebra program? In order to answer this question, a class was applied in which the use of the GeoGebra software was introduced, with the construction of a right triangle, in which the trigonometric ratios of sine, cosine and tangent were presented. The teaching methodology of this class is focused on the use of technologies in teaching mathematics and solving problems taken from the latest books available in the public school system. An evaluative questionnaire was applied at the end of this didactic proposal in order to obtain impressions after the students' participation in this class format and whether they contributed to their learning. It can be concluded that through practical activities through the GeoGebra software it is possible to introduce notions of trigonometric relations and highlight that students, in addition to understanding trigonometric ratios, approved the use of this software.