摘要：The purpose of this study was to investigate 8th students' concept images of prism, pyramid, cone and cylinder. For this purpose, students' definitions and figu ral recognitions of these objects were examined. Qualitative research method was used. Semi - structured interviews were conducted with 20 students chosen by maximum variation sample one of purposive sampling method . The collected qualitative data were analy zed by content analysis. In finding, the properties of solids's surfaces have been found to come forward in the images. Over specialization related to pyramids' base surface and overgeneralization depend on expression of prisms were found. As a result, ima ges depending on the prototypes could be effective in all levels of students and they could lead to misconceptions. Based on the results, in the teaching of solids it has been achieved the guiding tips.
