Jefri, Samuel2024-03-082024-03-082023-11PerpustakaanElfitrahttps://repository.unri.ac.id/handle/123456789/11360We discuss a development of mixtilinear incircle and excircle in bisectors of triangle. The development carried out demonstrates the relation that forms between the radii of mixtilinear incircles and excircles that can be constructed on the angle bisectors of 4ABC. In each triangle, three di erent mixtilinear incircles and excircles are formed. The relation between the radii of mixtilinear incircles and excircles on the angle bisectors of 4ABC is such that the ratio of the product of their radii to the angle they form is equal to the ratio of the bisecting lines that form them.enTrianglebisector angle of trianglemixtilinear incirclemixtilinear excircleArticle