The development of geometry test to analyze students’ creative thinking skills in the area of square formula derivation

Technology advances demand students to adapt creatively in solving problems. This research is development research with the intention of producing a certain product that validity, practicality, and effectiveness be tested, where the development process is described as thorough as possible then evaluated. This development of geometry test used Thiagarajan model or known as 4-D consisting of define, design, develop, disseminate stage. Geometry test that have been developed are used to describe students’ creative thinking skills. This creative thinking is divided into four things that are fluency, flexibility, elaboration, originality. The subjects in this research were 3 students of 32 Junior High School Class consisting of students in visualization, analysis and informal deduction level. Data retrieval in this research was done by using a test and interview. Based on the research result data, three students fulfilled creative thinking skills, among them student was classified as the category of quite creative (TKBK 2), who were fulfilling the indicator of fluency and flexibility, student was classified as the category of less creative (TKBK 1), who were fulfilling the indicator fluency, and student was classified as the category of creative (TKBK 3) so that fulfilling the indicator of fluency, flexibility, originality.