Geometric Intelligence in Sumba Weaving

What makes this finding even more intriguing is the question of whether traditional weavers learned about symmetry or geometric transformations through formal mathematics lessons.

Bandung (ANTARA) – At first glance, the motifs on Sumba woven cloth appear to be a series of images arranged to decorate the fabric. Some resemble horses, chickens, crocodiles and turtles, alongside various geometric shapes.

On closer inspection, however, the motifs form orderly and consistent patterns. Behind their beauty lies a way of thinking passed down from one generation to the next.

This discovery has attracted the attention of ethnomathematics researchers. They have found that Sumba weaving is not only an art form and a cultural symbol, but also preserves traces of knowledge about shapes, symmetry, balance and patterns that have developed within Sumba society over centuries.

When people hear the word mathematics, most imagine numbers, formulas and school lessons. Yet mathematical concepts do not always take formal forms. In many traditional communities, the ability to recognise patterns, organise space and create order develops through everyday experience.

The study of the relationship between culture and mathematical activity is known as ethnomathematics. Through this approach, cultural heritage can be understood as both a product of creativity and evidence of communities’ intelligence in understanding their surroundings.

Sumba woven cloth is one compelling example. The textiles have long been known for their beauty and the complexity of their production. Research, however, shows that their motifs contain patterns of order that can be explained using modern geometric concepts.

For the people of Sumba, woven cloth is more than a covering for the body. It has important social, cultural and spiritual functions in community life.

Certain cloths are worn at traditional ceremonies and weddings, as well as rituals connected with ancestors. The motifs are not chosen at random; they convey messages related to Sumba people’s identity and worldview.

In East Sumba, there are two principal types of cloth: the hinggi, worn by men, and the lau, worn by women. Through these textiles, cultural symbols are passed down from generation to generation.

Research by Erwin Ardianto Halim and colleagues at Maranatha Christian University shows that the ornamental arrangements on hinggi reflect the concepts of dualism and triple patterns. Two distinct elements are brought together in a complementary relationship, while a third serves as a counterbalance, creating harmony.

The hinggi can also be read as a representation of Sumba cosmology. The sections of the cloth are associated with three layers of the world: talaba dita (the upper world), la padua (the middle world) and talaba wawa (the lower world). This division shows how the people of Sumba understand the relationship between humans, nature and spiritual forces.

Mathematical traces in the ornamental motifs