Sólidos de revolução: uma proposta de estudo

Abstract

This paper aims to redeem a mathematical concept rarely seen by students – the concept of solid of revolution – and, through this concept, make them realize several variables studies and mathematical relations, seeking for a breakthrough in logic deductive reasoning and a more significant space perception. Was noticed that those solids are underexplored in High School, and yet, so common in our daily lives. Thus, a study proposal was developed for those High School students with activities designed to gradually built the definition of solid of revolution, using concrete materials and the winplot software, arousing the curiosity, interest, visualization, abstraction, the capacity building concepts, investigation and finally, the mathematical thinking and problem solving. In addition to explore the volumes of known definition and calculation, the major goal of this proposal is to introduce the disks technique to make the approximate volume calculus of solid generated by the rotation of plane regions, partially bounded by functions graphics already familiar to students (which are revolution solids). Through this study proposal is expected that students develop a better comprehension of revolution solids, what they are and how to calculate their approximated volumes even without a formula.