TINGKAT BERPIKIR SISWA SMP BERDASARKAN TAHAPAN VAN HIELE DI KOTA BATU

Geometry is already known by the students in the everyday life not only in school. For example, on the subject of sub lines in the form of rope stretched, the lines in the book, and more. Sub subject field in the form of tiles, tables, and more. Sub subjects such as space room, living room, and so forth. However, in reality many students who do not understand the concepts of geometry. According to Pierre van Hiele and Dina van Hiele-Geldof, there are five levels or levels: Level 0 (visualization), Level 1 (analysis), Level 2 (deduction informal), Level 3 (deduction) and Level 4 (Rigor). By using Van Hiele level can determine the level of students' thinking by that level. Analysis of the students' SMP Ma'arif Batu answers of the problems geometry, using the analytical model of Miles and Huberman. The analysis of this model, there are three levels of data reduction, data Display and verification or conclusion drawing. When performing data presentation and verification of data, data reduction can occur. Because of the qualitative research Miles and Huberman during data collection will occur without exception analysis. From the results of data analysis conducted during the study showed that in general the level of junior high school student thinking based on the phases of Van Hiele in Batu are at Level 0, namely Visualization level or levels where students recognize geometric shapes just the visual characteristics and appearance. Students have not been able to analyze the geometry that has been given. Students are not able to menghubungankan the properties of the two geometry. Students have not been able to compile evidence of the statements that need verification and still do not understand definis-definitions and axioms that apply to geometry.