Criação de um plano de razões e um teodolito com o uso do Arduino: uma proposta para o ensino de razões trigonométricas no triângulo retângulo

Abstract

The present work aims to show and evaluate two tools, developed through the use of the Arduino microcontroller integrated with a mobile application created in the visual programming environment of MIT (Massachussetts Institute of Technology), which can assist in teaching trigonometric reasons in the ringht triangle. The research was done with 56 students from the ninth grade of Elementary School, in a State School located in the municipality of Nova Iguaçu and divided into four classes of 100 minutes each. In the first class, a pre-test was applied to evaluate the students' knowledge about the subject that had already been studied. In the second, the necessary applications were installed for the development of the activities as well as the accomplishment of the activity with the tool, named by the author, Plan of Trigonometric Ratios with the objective of working through the investigation the concept of the Sine, Cosine and Tangent reasons in a triangle rectangle. In the third the activity was held in the patio with the use of the Theodolite (Built with the Arduino), aiming to calculate the height of the building of the school using the trigonometric reasons. In the fourth and last class, a post-test was applied to evaluate the evolution of learning after the activities were carried out and a Motivation questionnaire was applied, based on the motivational test of Gontijo, in order to verify the motivation conceived to the students through the use of Arduino as a teaching tool. Finally, an analysis of the test results and a survey of the information obtained in the Motivation questionnaire was carried out, observing an improvement in the students' learning and the motivation aroused by the use of the teaching tools used in the classes.