Material concreto para o ensino de trigonometria

Abstract

This paper was conceived to discuss the importance of dealing with concrete material in trigonometry in high school classes. Although the work with this kind of material has been considered important in primary school many times it is forgotten in high school teaching. In this project the goal is to show how to use concrete material in trigonometry classes and give some ideas of activities and workshops to make the mathematic classes more pleasant and meaningful to teenagers. The main reason for this approach is the great difficulty found in teaching/learning trigonometry using only mental relations and formulas.