Strategi Pemecahan Masalah Matematika Siswa SMP Ditinjau Dari Tingkat Berpikir Geometri Van Hiele

Abstract

This study aimed to describe the mathematical problem-solving strategy of junior high school students based on Van Hiele levels of geometry thinking, namely visualization, analysis and informal deduction. This study was a qualitative research that produced descriptive data. Subjects of this study consisted of three students of class VIII-F SMPN 1 Waru, Sidoarjo. The study began by determining the subject of research by using Van Hiele’s geometry test, and then given problem solving task and interviews. For checking the validity of the data used a triangulation of time. Student problem solving strategies will be analyzed based on the stages of Krulik and Rudnick’s problem solving, which consists of (1) to read and think, (2) explore and plan, (3) selecting a strategy, (4) find the answers, and (5) review and discuss. The results showed that 1) the strategy of visualization student in solving mathematical problems was drew a picture, logical reaso- ning, wrote an equation or an open sentence, and made organized list, the visualization subject did not understood that a square was a rectangle. 2) The analysis student in solving mathematical problems was used logical reasoning strate- gies, guessed and checked, and drew a picture, the analysis subject did not understood that a square was a rectangle. 3) The strategy of informal deduction student in solving mathematical problem was drew a picture, logical reasoning, wrote an equation or an open sentence and guessed and checked, the subject of informal deductions had understood that a square was a rectangle. Keywords: