DOI: 10.56773/bj.v2i2.33 E-ISSN: 2809-8528 Brillo Journal Volume 2, Issue 2, June 2023, pp. 80-93 80 EXPLORATION OF GEOMETRY CONCEPTS AT THE TRADITIONAL HOUSE OF TAFATIK MAROMAK OAN MALAKA Oktaviani Marisa Tahu , Aloisius Loka Son*, Yohanis Ndapa Deda Universitas Timor, Kefamenanu, Indonesia Email: aloisiuslokason@unimor.ac.id Abstract Ethnomatematics is an intersection between mathematics and culture, making it a study of mathematical concepts within a specific cultural context. In line with this, the present research aimed to explore the mathematical concepts present in the Tafatik Maromak Oan traditional house. This research is qualitative research with an ethnographic approach. This research was conducted in August 2022 in Wehali Village, Central Malaka District, Malaka Regency. The instruments used are observation guidelines, interview guidelines, and documentation. Participants in this study consisted of 4 people with details of 1 King (Nain), 1 traditional housekeeper (fukun), 1 craftsman and 1 community member. The stages in this study consisted of domain analysis, taxation analysis, componential analysis, analysis of cultural themes, and drawing conclusions. The results of this study indicate that the mathematical concepts contained in the Tafatik Maromak Oan Malaka traditional house are geometric concepts including rectangles, squares, triangles, circles, lines, cylinders and trapezoids. Keywords: Ethnomatematics, Exploration, Traditional house of tafatik maromak oan malaka. Abstrak Etnomatematika merupakan ruang irisan antara matematika dan budaya, menjadikannya studi tentang konsep matematika dalam konteks budaya tertentu. Sejalan dengan itu, penelitian ini bertujuan untuk menggali konsep matematika yang ada pada rumah adat Tafatik Maromak Oan. Penelitian ini merupakan penelitian kualitatif dengan pendekatan etnografi. Penelitian ini dilaksanakan pada bulan Agustus 2022 di Desa Wehali, Kecamatan Malaka Tengah Kabupaten Malaka.Instrumen yang digunakan adalah pedoman observasi, pedoman wawancara, dan dokumentasi. Partisipan dalam penelitian ini terdiri dari 4 orang dengan perincian 1 orang Raja (Nain), 1 orang penjaga rumah adat (fukun),1 orang tukang dan 1 orang anggota masyarakat. Tahapan dalam penelitian ini terdiri dari analisis domain, analisis taksionamianalisis komponensial, analisis tema budaya, dan penarik kesimpulan. Hasil penelitian ini menunjukan bahwa konsep geometri yang terdapat pada rumah adat Tafatik Maromak Oan Malaka adalah konsep geometri diantaranya, persegi panjang, persegi, segitiga, lingkaran, garis, slinders dan trapisium. Kata Kunci: Eksplorasi, Etnomatematika, Rumah adat tafatik maromak oan malaka. How to Cite: Tahu, O. M., Son, A. L., & Deda, Y. N. (2023). Exploration of Geometry Concepts in the Tafatik Maromak Oan Malaka Traditional House. Brillo Journal, 2(2), 80-93. INTRODUCTION Mathematics is actually used by everyone in everyday life. However, many people often fail to realize the practical applications of mathematics in their daily routines. They often perceive mathematics solely as a subject studied in school. In reality, mathematics is an integral part of culture that has existed since ancient times and can be utilized to