Ethnomathematics: Exploration of transformation geometry elements in Troso weaving motifs

Abstract

Troso weaving is one of original cultural product from Jepara, Indonesia. Similarly with batik, weaving has various motif as well, such as flora, fauna and geometry. Weaving Troso are not only fabrics with the different motif, but also relate with mathematics aspect such as transformation geometry. This study aims to explore the elements of transformation geometry in Troso weaving motifs. The type of this research is qualitative research. This study used a semi-structured interview that focused on two questions: are there mathematical concepts in this jaran motif? Are there geometric transformation concept in jaran motif? Interviews were conducted with four mathematic teachers via video call using WhatsApp (WA).The data were analyzed qualitatively, followed by the concept given by Miles and Huberman. The result showed that weaving Troso motifs contains the concept of geometry such as rhombus, parallel line and rectangle while the geometry transformation concept includes reflection, translation, rotation, dilation. The study implies that Trowo weaving motif then be used as learning media in schools by introducing existing cultures in Indonesia.