@article{ART002988467},
author={Kim Nam Gyun and Oh, Min Young and Lee, Mi Rim and Kim, Su Ji and Song, Dong Hyun},
title={Construction of and Justification for the Acute and Obtuse Triangle Using the Right Triangle Manipulative Materials},
journal={Journal of Studies on Schools and Teaching},
issn={2508-156X},
year={2023},
volume={8},
number={2},
pages={61-93},
doi={10.23041/jsst.2023.8.2.003}
TY - JOUR
AU - Kim Nam Gyun
AU - Oh, Min Young
AU - Lee, Mi Rim
AU - Kim, Su Ji
AU - Song, Dong Hyun
TI - Construction of and Justification for the Acute and Obtuse Triangle Using the Right Triangle Manipulative Materials
JO - Journal of Studies on Schools and Teaching
PY - 2023
VL - 8
IS - 2
PB - Education Research Institute at CNUE
SP - 61
EP - 93
SN - 2508-156X
AB - The purpose of this study is to examine the elementary school students’ understanding of acute and obtuse triangles using the jigsaw manipulative materials in the form of right triangles. To do that, the results of 15 fourth graders’ constructions of acute and obtuse triangles with the right triangle manipulative materials were quantitatively analyzed, and the types of justifications for the definition and properties of the triangles were qualitatively analyzed. The results of the study showed that students constructed a variety of acute and obtuse triangles using the right triangle manipulative materials, and there were differences in the construction results depending on the type of triangle, with some students constructing more acute triangles more easily than obtuse triangles. Students’ justifications for constructing the acute and obtuse triangles were either empirical justifications based on manipulation and intuition, or analytical justifications based on mathematical properties. It is also noteworthy that the types and characteristics of the justifications differed based on the students’ understanding of triangles. Based on this study, it can be said that the right triangle manipulative materials are useful for the elementary school students’ construction and justification of acute and obtuse triangles, yet it is necessary to conduct follow-up research on teaching and learning that would consider the characteristics of the students’ geometrical construction and justification.
KW - right triangle manipulative materials;acute triangle;obtuse triangle;mathematical justification;manipulating manipulative materials
DO - 10.23041/jsst.2023.8.2.003
ER -
Kim Nam Gyun, Oh, Min Young, Lee, Mi Rim, Kim, Su Ji and Song, Dong Hyun. (2023). Construction of and Justification for the Acute and Obtuse Triangle Using the Right Triangle Manipulative Materials. Journal of Studies on Schools and Teaching, 8(2), 61-93.
Kim Nam Gyun, Oh, Min Young, Lee, Mi Rim, Kim, Su Ji and Song, Dong Hyun. 2023, "Construction of and Justification for the Acute and Obtuse Triangle Using the Right Triangle Manipulative Materials", Journal of Studies on Schools and Teaching, vol.8, no.2 pp.61-93. Available from: doi:10.23041/jsst.2023.8.2.003
Kim Nam Gyun, Oh, Min Young, Lee, Mi Rim, Kim, Su Ji, Song, Dong Hyun "Construction of and Justification for the Acute and Obtuse Triangle Using the Right Triangle Manipulative Materials" Journal of Studies on Schools and Teaching 8.2 pp.61-93 (2023) : 61.
Kim Nam Gyun, Oh, Min Young, Lee, Mi Rim, Kim, Su Ji, Song, Dong Hyun. Construction of and Justification for the Acute and Obtuse Triangle Using the Right Triangle Manipulative Materials. 2023; 8(2), 61-93. Available from: doi:10.23041/jsst.2023.8.2.003
Kim Nam Gyun, Oh, Min Young, Lee, Mi Rim, Kim, Su Ji and Song, Dong Hyun. "Construction of and Justification for the Acute and Obtuse Triangle Using the Right Triangle Manipulative Materials" Journal of Studies on Schools and Teaching 8, no.2 (2023) : 61-93.doi: 10.23041/jsst.2023.8.2.003
Kim Nam Gyun; Oh, Min Young; Lee, Mi Rim; Kim, Su Ji; Song, Dong Hyun. Construction of and Justification for the Acute and Obtuse Triangle Using the Right Triangle Manipulative Materials. Journal of Studies on Schools and Teaching, 8(2), 61-93. doi: 10.23041/jsst.2023.8.2.003
Kim Nam Gyun; Oh, Min Young; Lee, Mi Rim; Kim, Su Ji; Song, Dong Hyun. Construction of and Justification for the Acute and Obtuse Triangle Using the Right Triangle Manipulative Materials. Journal of Studies on Schools and Teaching. 2023; 8(2) 61-93. doi: 10.23041/jsst.2023.8.2.003
Kim Nam Gyun, Oh, Min Young, Lee, Mi Rim, Kim, Su Ji, Song, Dong Hyun. Construction of and Justification for the Acute and Obtuse Triangle Using the Right Triangle Manipulative Materials. 2023; 8(2), 61-93. Available from: doi:10.23041/jsst.2023.8.2.003
Kim Nam Gyun, Oh, Min Young, Lee, Mi Rim, Kim, Su Ji and Song, Dong Hyun. "Construction of and Justification for the Acute and Obtuse Triangle Using the Right Triangle Manipulative Materials" Journal of Studies on Schools and Teaching 8, no.2 (2023) : 61-93.doi: 10.23041/jsst.2023.8.2.003
