Level of Students Geometry Thinking on quadrilateral topic M E Nggaba, Y S Eko, Irna N Sanit
Program Studi Pendidikan Matematika,
Fakultas Keguruan dan Ilmu Pendidikan,
Universitas Kristen Wira Wacana Sumba
Abstract
Quadrilateral is one of the geometry topics in the curriculum and must be understood by students of junior high school. Therefore, to identify and describe students^ geometric thinking level, research was conducted on 40 students (11/13 years) in Kambera District, East Sumba Regency, East Nusa Tenggara. This research is descriptive qualitative research with data collection techniques is a written test for the quadrilateral case. The data were analyzed using van Hiele^s theory. The results showed that 1) only one-third of the number of students are at level 0 (visualization) i.e., students knew geometric pictures by observing the pictures or models. At this level, half of the students still make mistakes in classifying the types of quadrilaterals, and 2) only a few students are at level 1 which is able to understand or know the properties of quadrilaterals. From the written results, it was found that almost all students did not understand the topic of quadrilaterals and their properties well. We conclude that almost all students have not been able to recognize and classify the types of quadrilaterals well.
Keywords: van Hiele theory, Geometric Thinking Level, Quadrilaterals
