摘要：The purpose of this research is to know how Na.ve Geometry method can support students' understanding about the concept of solving quadratic equations. In this article we will discuss one activities of the four activities we developed. This acti vity focused on how students linking the Na.ve Geometry method with the sol ving of the quadratic equation especially on how student bring geometric solution into algebraic form. This research was conducted in SMP Negeri 1 Palembang. Design research was chosen as method used in this research that have three main phases . The results of this research showed that manipulating and reshaping the rectangle into square could stimulate students to acquire the idea of so lving quadratic equations using completing perfect square method. In the end of the meeting, students are also guided to reinvent the general formula to solve quadratic equations
