Treatment of the concept of angle in elementary school textbooks in Chile
DOI:
https://doi.org/10.18172/con.5149Keywords:
Geometry, basic education, Primary school teacher, Mathematics education, Public educationAbstract
For the work of this article, the mathematical object angle and its progression in primary school textbooks of the Chilean educational system, which are delivered free of charge to schools that receive state resources, were analyzed. The activities, solved exercises and proposed situations were classified into various categories according to their definition, meaning and associated difficulties. The results show a marked tendency to show the angle as a pair of rays with a common point in a static sense, which brings various difficulties, among which those that exclude some angle measurements such as 0°, 180°, stand out mainly. 360 °, negative angles and those that have a measure greater than 360°. It is concluded that one of the ways to avoid these difficulties is to work this object with a dynamic meaning, in systems with an initial beam and a final beam that rotates to form the desired angle, without excluding those already mentioned and thus avoiding generating difficulties in internalization. of this concept by the students.
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