PRELIMINARY STUDY ON THE LEVEL OF STUDENT GEOMETRY THINKING BASED ON VAN HIELE TEORY: THE CASE OF QUADRILATERAL Yuliana Selfia Eko, Sufyani Prabawanto, Al Jupri
Universitas Pendidikan Indonesia
Abstract
This study aims to describe the level of students in solving quadrilateral problems based on Van Hiele theory. Therefore, we conducted a small, qualitative study involving 30 junior high school students in one of the schools in NTT, Indonesia. The subject of building a rectangular flat. The instrument used is a quadrilateral description of lecturers who have mathematics education background. Futhermore, the test results are based on the level of Van Hiele thinking. The results show that 60% of students who are at level 0 (visualization), 30% students who are classified as level 1 (abstract) and 10% students who classified level 2 (reasoning). Further analysis shows that in completing the given problem, students tend to regard images as absolute standards of truth and do not capture the hidden information contained in the image so that difficulty in completing them. Students also tend to be fixated on formulas resulting in a lack of reasoning ability in solving contextual problems. Similarly, when finalizing the problem of proof, students still use informal evidence using examples.
Keywords: geometric thinking, Van Hiele Teory, quadrilateral
