Ethnomathematics: Geometric Meaning and Cultural Values of Tegalsari Mosque in Mathematics Learning

This research aims to explore the geometric elements and symbolic meanings in the architecture of the Tegalsari Mosque as a source of ethnomathematics learning in elementary schools. An interpretative qualitative approach was used with data collection through observation, architectural documentation, and literature study of Islamic-Javanese symbolism. The results show that the shapes of pyramids, cylinders, blocks, and diamond-shaped ornaments serve structural functions and contain spiritual values such as transcendence, balance, and order. These findings indicate that geometric shapes in mosques can be utilized as a medium for contextual and culturally valuable geometry education. This study expands the approach of ethnomathematics by integrating the analysis of shapes and symbolic meanings within the local context. The practical implications lead to the development of a mathematics learning model that connects abstract concepts with the cultural and religious environment of students.