Ethnomathematics Vs Ethomodeling: how does cigugur traditional community determines the direction of the wind to seek fortune based on month

Abstract

Abstract This study discusses the way of Cigugur indigenous communityin predicting the direction ins seeking fortunes. It uses a phenomenological approach with a realist ethnographic design through observation techniques, in-depth interviews, documentation, and field notes. The findings of this study indicate that the system of knowledge and livelihood which are included in the universal element of culture are implemented by the community using formal mathematical principles. Ethnomathematics as a research genre tries to reveal the dimensions of basic universal mathematical activities, while ethnomodeling as a methodology is used to represent the ideas and practices of community mathematics into academic mathematics through ethical, emic and dialctical approaches. The combination of naktu weton lahir, naktu pasaran, naktu tahun and naktu bulan, the time of one’s birth month can be used to predict a good direction in seeking fortune. Based on the study of ethnomathematics, the community determines the direction in seeking fortune, the mathematical concept used by the traditional Cigugur community is the concept of sequential pairs, relations, summations, and comparisons. Meanwhile, based on ethnomodeling, the community uses the concept of modulo and congruence. Ethnomatematics and ethnomodeling provide a different perspective on the conceptual mathematics that is inherent with the universal element of holistic culture.