Abstract
Solving mathematical word problems are still considered as a difficult matter for the students, because the word problems are related to many mathematical concepts. This study aims to identify students' error in solving the word problems deal with plane geometry. The method used in this study was descriptive-qualitative approach. The subjects were 23 grade 7 students from one of Junior High School in Subang, Indonesia. The wrong answer was the analysis. The analysis of students' error based on Polya strategy. The results showed that most of the student made mistakes in transforming the word problem related to plane geometry into a mathematics model; both formulas or illustrations with pictures. In this study, it was also found that the ability to calculate operations was the most common error found in students' answers. It is expected that there will be other research that can be minimize students error related to the plane geometry topic.
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