Abstract
Mathematics is a subject that requires the students to gain reasoning abilities. Reasoning ability can be found when students learn geometry material. However, several studies concluded that geometry material is one of the difficult material for students. Difficulty of geometry is caused by the majority of mathematics teachers still use conventional media and teaching instruments in learning, especially in term of constructing the space. This is implemented on the AR-Geometry Interactive Book. This book is designed by using the principle of interactive 3D (three-dimensional) appearance by utilizing Augmented Reality (AR) based technology. This research uses a combination of qualitative and quantitative methods. The first qualitative data was taken by depth interviews to 4 informants selected with certain conditions using purposive sampling technique. The first phase of data collection aims to explore the information related to student interest in using the AR-Geometry Interactive Book. Furthermore, the second stage data was taken using a questionnaire to 21students in class VIII of SMPN 4 Ujung Batu. The second stage of data collection aims to support the results of the first phase of the research, all data in the second stage were then analyzed descriptively using quantitative analysis tools. Overall, the results of the second analysis indicate that the AR Geometry Book is appropriate to use in learning. To see students’ mathematical reasoning abilities, tests were conducted by testing 3 essay questions. The results of the study prove that the use of AR-Geometry Interactive can improve students’ mathematical reasoning abilities.
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