Examination of 4th Grade Students' Definitions for Square, Rectangle and Triangle Geometric Shapes

The aim of this study is to obtain information about students' definitions, mistakes, misconceptions, and van Hiele geometry thinking levels by using the definitions 4th grade students for geometric shapes rectangle, square, isosceles triangle, equilateral scalene triangle. was carried out with 156 primary school students. In study, case design, one qualitative methods, used. Students were asked describe shapes. It observed that most participating in visualization stage Hiele. There are very few hierarchical structure study. Most correct partitional form. misconceptions detected some