Abstract
The circle is an important concept that is taught from basic to university level. But in reality there are still difficulties in learning the circle, so that required learning media such as with Geogebra. This research is quasi-experimental research with the aim of analyzing students’ understanding of the concept of circle and attitude of students to learning. The study population was all students who have studied the analytical geometry course for the 2017/2018 school year at one of the universities in Indonesia. The sample was selected by purposive sampling. Class A as an experimental class with geogebra learning, while class B as a control class using teaching manipulatives. Before and after the course they were examined test and the results were evaluated. The analysis data shows the increase of students’ understanding of the concept of circle in the experimental class (using Geogebra) is higher than the control class (using manipulatives). Students’ attitude toward learning using Geogebra is positive.
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