MusrainiPane, Rolan2013-03-212013-03-212013-03-21wahyu sari yenihttp://repository.unri.ac.id:80/handle/123456789/2643In this paper, two concepts that are discussed are related to the relationship between the sides of any triangle with the incenter and circumcenter. On the other hand because ratio of the incenter and circumcenter and area of a triangle related to the construction of the triangle. So in this paper will also be discussed in a triangle that has the smallest perimeter.enincenterCircumcenterAssila InequalityFagnano's InequalityUR e-Research