Ethnomathematics and Philosophical Values in Angklung

Ethnomathematics studies how communities develop and apply mathematical concepts within their cultural contexts. The angklung, a traditional Indonesian musical instrument, represents a meaningful cultural artifact that expresses ethnomathematical principles. The angklung allows people to connect with ethnomathematics because it shows how culture integrates mathematical ideas into daily practices. This study aims to explore: (1) the relationship between mathematical concepts (ethnomathematics) and the traditional musical instrument angklung, and (2) the philosophical values embedded in the angklung. The researchers conducted this study using a qualitative approach at Az-Zaitun Kindergarten in Medan. The researchers applied a descriptive analysis method to clearly and systematically explain the angklung's ethnomathematical aspects and philosophical values. The findings reveal that: (1) the mathematical concepts related to the angklung include geometry, similarity, and combinations; and (2) the philosophical values embedded in the angklung include patriotism, responsibility, discipline, honesty, collaboration, and tolerance.