Via this study, it is studied that the effects of geometry teaching with which made by Cabri 3D-tree Cabri 3D activities were which exists, it is prepared work sheets coherent software and applied. This study is an experimental work and it is carried with thirty-two eighth grade students who are studying in a school in Southeastern Anatolia Region. An exam including seven open-ended questions measuring the conceptual learning according to learning of this works and developed by investigators for determining the effectiveness of learning is applied to groups. It is carried out qualitative and quantitative analysis methods in analyzing data. According to the findings, it’s observed a statistically significant difference in favor of the experimental group were formed.in post-test scores of groups. Consequently, it is observes that education with Cabri 3D contributed to conceptual learning of student and they acquired generalization.