Ethnomathematics as an Exploration of Cultural Mathematical Concepts in Traditional Indonesian Engklek Games

Culture and mathematics are a unified whole. This can be seen from the culture in Indonesia, which is very diverse, ranging from traditional houses, traditional ceremonies, traditional clothes, traditional musical instruments, traditional games, regional dances, folk songs, places of worship, museums, inscriptions, temples, etc. Basically, contain mathematical concepts. The relationship between mathematics and culture is called ethnomathematics. So that this study aims to explore the mathematical concepts that exist in the culture of Indonesia, one of which is the traditional engklek game. The method in this study is a qualitative research method with an ethnographic approach. The method is done by the method of observation and documentation. The results showed mathematical concepts in engklek patterns, game rules, and gaco. The mathematical concepts in the game are the concept of two-dimensional geometry, numerators, calculations, and probability.