Abstract: It is very important for controlling the objects’ balance and stability that to grasp the center of gravity position in many cases. For some of the actual sheet-like structures, how to quickly identify the location of its center of gravity? Analytical method using the coordinates of many points to be determined is time-consuming and labor-intensive; using the test method (suspension method) in many cases is unrealistic; In this paper presents a geometry to quickly determine the center of gravity location of the uniform shin polygon.