Abstrak
Conflicts that occur within students in solving geometry problems are a concern for lecturers in the classroom. This is due to the occurrence of conflicting concepts in the minds of students. These concepts can be studied from various points of view, but if students cannot integrate the various information it will cause conflict. This conflict is internal and is known as cognitive conflict. Lecturers can apply appropriate learning strategies when they know the cognitive conflicts that occur in students. This study aims to describe the cognitive conflicts of students in solving the equation of a circle. The research method used is descriptive qualitative. This study involved students who experienced cognitive conflict as a sample. The instruments used are tests and interviews. The results showed that there were eight forms of cognitive conflict that emerged when students completed the given questions. There is a tendency where students can determine the center and radius of a circle correctly but have difficulty drawing a circle from the given equation