Study of concept image pre-service mathematics teachers on congruent triangle materials
M. G. Jatisunda (a*), D. Suryadi (b), S. Prabawanto (c)

a) Departemen Pendidikan Matematika, Sekolah Pascasarjana, Universitas Pendidikan Indonesia,
*g.jatisunda[at]upi.edu
b) Departemen Pendidikan Matematika, Sekolah Pascasarjana, Universitas Pendidikan Indonesia,
c) Departemen Pendidikan Matematika, Sekolah Pascasarjana, Universitas Pendidikan Indonesia,

Abstract

Two categories of mathematical concepts are primary concepts and defined concepts. Sometimes the teacher^ has thoughts: I will explain the concept, and students will be memorizing the definition, and immediately I can assume that the concept has been acquiring. Theoretically, the concept image is not unique, but the concept image formed results from each individual^s representation. The purpose of this study is to examine the concept image of the congruent triangle materials pre-service mathematics teachers. The research method used is qualitative with the hermeneutic phenomenology approach to interpret the implication that someone against an experience obtains. Participants in this study were three pre-service mathematics teachers--data collection by tests congruent triangle materials and in-depth interviews. Based on the results of the research, students^ answers depend on their previous experiences. Besides, there were several wrong perceptions in answering questions and misconceptions in the use of congruent formulas.

Keywords: concept image, congruency triangle, pre-servive mathematics teacher

Topic: Mathematics Education