East Asian mathematical journal

The Youngnam Mathematical Society (영남수학회)
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A Study on the Plane Figure of Elementary School Mathematics in the View of Classification

분류의 관점에서 초등수학 평면도형 고찰

  • Kim, Hae Gyu (Department of Mathematics Education, Teachers College Jeju National University) ;
  • Lee, Hosoo (Department of Mathematics Education, Teachers College (Elementary Education Research Institute) Jeju National University) ;
  • Choi, Keunbae (Department of Mathematics Education, Teachers College Jeju National University)
  • Received : 2021.06.02
  • Accepted : 2021.08.03
  • Published : 2021.08.31
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Abstract

In this article, we investigated plane figures introduced in elementary school mathematics in the perspective of traditional classification, and also analyzed plane figures focused on the invariance of plane figures out of traditional classification. In the view of traditional classification, how to treat trapezoids was a key argument. In the current mathematics curriculum of the elementary school mathematics, the concept of sliding, flipping, and turning are introduced as part of development activities of spatial sense, but it is rare to apply them directly to figures. For example, how are squares and rectangles different in terms of symmetry? One of the main purposes of geometry learning is the classification of figures. Thus, the activity of classifying plane figures from a symmetrical point of view has sufficiently educational significance from Klein's point of view.

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Acknowledgement

이 논문은 2020학년도 제주대학교 교원성과지원사업과 2020년 정부(교육부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구임(NRF-2019S1A5C2A04083374)

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