Concept of transformation geometry in the traditional woven fabric of West Amarasi society

The woven fabric of West Amarasi society is one of the cultural products which contains the society’s mathematical ideas, knowledge, and values. This study aimed to describe mathematical concepts, especially the concept of transformation geometry, and philosophical values contained in woven fabrics of the West Amarasi society. This study was a descriptive qualitative with the ethnographic method. Data was collected using interviews, field observations, literature studies, and documentation. Interviews were conducted with five research subjects from the indigenous people. The results showed that the concept of transformation geometry, namely translation, rotation, reflection, and dilatation, was identified in the West Amarasi traditional woven fabric, especially in motifs of pan buay ana, kai ne’e, kaimanfafa, and noe riu. It also found that each motif contains philosophical meanings that illustrate that the people of West Amarasi are meticulous and strict in maintaining various valuable things and documents, upholding brotherhood, having good relations and cooperating with other communities, and having a strong personality with high nationalism. The finding of this study can be a consideration for the teacher to design mathematics learning based on the West Amarasi woven fabric.