Augmented reality (AR) is one from many multimedia technologies which allows computer-generated content to be seamlessly overlaid and mixed into humans’ perceptions of the real world. In educational field, many researchers believe AR technology can improve user interface technology and has a huge potential implication as well as numerous benefits from the virtual augmentation of learning environments or even a teaching process. However, in the earlier researches about AR geometry educational tool, researchers did not use any pedagogical approach in its application design process. In fact, a pedagogical approach is needed for creating an effective educational application to make sure students’ learning time is spent productively. In this research, we try to create AR geometry educational tool by using design-based learning and game-based learning approach to create a better geometry educational tool. Furthermore, the application also used iterative software development lifecycle that requires a series of prototype to find the best AR game mechanics in geometry learning process.