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This article presents results obtained from an investigation in the development of a master's thesis, titled "Geometric learning about present ideals in the simulation of a two-stroke engine in GeoGebra: A case study". This research was carried out in the Graduate Program in Science and Mathematics Education of the Federal University of Pará. This article describes the processes of objectification of the geometric notion of the circular sector manifested by a group of students of the Integrated Degree in Science, Mathematics and Language in activities of Simulator Development with GeoGebra (ESG). Specifically, the objectification of the referred geometric content was evidenced in the mathematical work activities carried out to simulate the crankshaft of a two-stroke engine in GeoGebra. This study took as a theoretical foundation the Theory of the Objectification, to have an optics that would allow the objectification of geometric knowledge to be described to describe the group of students they come across the notion of circular sector when simulating a crankshaft of a two-stroke engine in GeoGebra. The research data comes from the recordings made in the work sessions with students and teachers when they carried out the activities, particularly at the time of mathematical work. We performed a multisemiotic analysis of the information obtained from the transcripts made from the recordings. The results focus on how students use semiotic means of objectification to express and shape the notion of circular sector.

La objetivación de la noción de sector circular en el trabajo matemático con GeoGebra