“…As a multi-ethnic area, North Sumatra has a variety of cultures, both languages, religions, tribes, traditional houses and traditions (Laudra et al, 2021). There are several ethnomathematics studies in North Sumatra, some of which are: (1) Siti Aisyah Sagala, Rusi Ulfa Hasanah Ethnomathematics exploration of the Maimun Palace in North Sumatra, there are evidence of mathematical operations in planning the construction of the Maimun Palace and making the pattern for the walls of the Maimun Palace (Rizqi et al, 2022), (2) Ethno-mathematical exploration of the Gordang Sambilan musical instrument, the results of the study show that there are concepts of arithmetic sequences and geometric concepts in these musical instruments (Lubis et al, 2018), (3) An ethnomathematics study of Bagas Godang shows that there is a mathematical concept in the form of geometric transformations (Dewita et al, 2019).…”