When the importance of geometry is taken into consideration, among the things to be done, the most crucial
is the improvement of geometry education. If the improvement of geometrical thinking is taken into account, it is
thought that the students should construct the geometrical rules as if s/he was discovering them for the first time
rather than endeavoring to apply the bulk of rules provided by their teachers. Hence, in this research, the
student-centered 4MAT teaching model which depends on learning by doing-experience and which is believed
to give this opportunity to the students has been utilized.