Abstract :
Culture is a community habit that occurs from generation to generation which becomes the identity of an area. One that bridges education and culture especially mathematics education is ethnomatematics. Ethnomatematics is a science that connects cultural problems contained in a tribe or area with mathematical elements. The purpose of this study is to explore the mathematical elements in the traditional house of Adonara, east Flores district. This research is a qualitative research with etnographich approach. The research was carried out in the village of Lamablawa, Witihama District, East Flores Regency. The subjects of this study were the tribal chief and local architects of the Adonara lango belen traditional house. Data collectionin this study is in the form of secondary data sources and primary data sources. Presentation of data in the form of observation guiledines, interview guidelines and documentation. Data analysis was carried out through three stages, namely data collection, data reduction and data display. The results of this study indicate that building elements such as pillars, walls, and roof of the Adonara lango belen traditional house contain mathematical concepts contained in one dimensional geometry, two dimensional geometri and three dimensional geometry.