Analysis of students' problem solving skills of geometry 3D shapes mathematical problems through Krulik and Rudnick steps

Abstract

Descriptive qualitative research method was used in this research to represent the students' problem solving skills in solving mathematical problem of geometry 3d shapes. The steps that were observed in the study includes: reading and thinking, exploring and planning, choosing a strategy, finding answer, and reflecting and extending. The students from grade 8 in Plus Hidayatul Mubtadi'in Singosari Junior High School were selected as the subject of this study. Test and interview were selected as the data collection technique, and the instrument used in this study were problem solving test of geometry 3d shapes, interview questions, and recorder. The steps of data analysis in this study was data reduction, data displaying, and conclusion drawing. The result of this study concludes that the students with higher skills of problem solving could correctly and accurately solve the mathematical problem of geometry 3d shapes. Moreover, the students with the average skills in problem solving could correctly solve the mathematical problem of geometry 3d shapes, however the inaccuracy in solving the problem in finding answer, and reflecting and extending leaded to mistakes. Additionally, the students with lower problem solving skills tended to answer the answer the problem in blind haste without even understanding the question that ultimately leaded to the severe mistake in every steps.