Profile of Students’ Geometric Thinking Ability in Terms of Van Hiele Level

Abstract

The ability to think geometrically is very important to be improved in students at all levels of school, from an early age to college. In the ability to think geometry, there is a level which of course an individual will have according to age level and school level. This includes universities, where students who can think abstractly and logically will be at level 3 (informal deduction) or 4 (rigor). But of course, it is necessary to study more deeply the characteristics at each level of thinking possessed by students. Given this need, the purpose of this study is to determine the profile of students' geometric thinking abilities based on Leve Van Hiele. This research is a qualitative descriptive study by describing the ability to think geometry based on the van Hiele level. The research sample is the 3rdsemester students of the mathematics education study program at one of the private universities in Semarang who have received the spatial geometry course. Data were obtained from van Hiele-level evaluation tests, observations, and interviews. The results showed that the ability to think geometrically is level 4, requires time to think about how to solve the problem of proof, needs to dig deeper and recall the concepts involved in solving it. The ability to think at level 3, students actually solve it in a different way. The ability to think at level 2, students can complete a good process and use the concepts they already have and interviews. The results showed that the ability to think geometrically level 4, requires time to think about how to solve the problem of proof, and needs to dig deeper and recall the concepts involved in solving it. The ability to think at level 3, students actually solve it in a different way. The ability to think at level 2, students can complete a good process and use the concepts they already have and interviews. The results showed that the ability to think geometrically level 4, requires time to think about how to solve the problem of proof, and needs to dig deeper and recall the concepts involved in solving it. The ability to think at level 3, students actually solve it in a different way. The ability to think at level 2, students can complete it a good process and use the concepts they already have.