Nineth grade students mistakes when solving congruence and similarity problem

Abstract

This research aims to know the difficulty level and the difficulties faced by students on congruent and similar problems. The test is taken from students' mid-semester exam in march 2021. Students' learning condition is under the coronavirus pandemic. This research uses a mix-method to process its data which are the qualitative and quantitative methods. The quantitative method is used to analyze the difficulty level and the qualitative method will explain the difficulties faced by students when solving congruent and similar problems. There are 9 questions given in this research that consists of 8 visual problems and one combined problem. The difficulties of the problems are four questions with easy difficulty and five questions with medium difficulty. The sample of this research is 61 9th grade students from SPMN 47, Bandung, Indonesia. The data is taken by using the google platform. The second data will be taken from teachers' interview results following the analysis of students' difficulties when solving congruent and similarity problems. The test result average is 64.77 and teachers' interview result shows that the poor test result is because teachers are not prepared with the teaching condition during the coronavirus pandemic. A recommendation for teachers is that they can improve their ability by integrating technology in mathematics.