Exploration of Ethnomathematics in Pekanbaru City Traditional Hall Building

Culture plays an important role in the emergence and development of mathematics learning. However, students still do not realize that mathematics is very close to students, especially in its own cultural elements. One of the cultural buildings that can be seen in Pekanbaru City is the Pekanbaru City Traditional Hall, which is a type of traditional house that still exists today. The aim of this research is to explore the mathematical concepts that exist in the Pekanbaru City Traditional Hall building. This research is qualitative research with an ethnographic method where data is collected through literature review and observation. Then data reduction, data presentation and conclusion drawing are carried out. The results show that the mathematical concepts that can be expressed in the Pekanbaru City Traditional Hall building are counting, flat shapes, relationships between angles, congruence, the Pythagorean theorem, and geometric transformations. It is hoped that the results of this research can be used by school teachers as a source of mathematics learning.