The Ethnomathematical Study about the Trampahan (Water Gates) of Brackish Water Fish Culture in Banate, Iloilo

As we see Mathematics as part of our everyday life and culture, it becomes important to study ethnomathematics. This helps us understand how different communities use and express Mathematics in ways that are meaningful to them. This study aims to identify the ethnomathematical concepts in constructing the water gates (Trampahan) and its impact in fish growth and farm productivity of Brackish Water Fish Culture in Banate, Iloilo. This research looks at the math ideas in these cultural practices of constructing the Trampahan to help improve math education and support fish farming. This qualitative ethnographic study as researchers as the main instrument, gathered data through interviews, observation, and photographic and video documentation. The results, data presentation, discussions and conclusions were carried out for each analysis. The results show that there are mathematical concepts rooted in constructing every part of the Trampahan (water gates). There are mathematical concepts, including symmetry, ratio and proportion, quadrilaterals, angles and length measurements with non-standardized units. These results showed that in constructing the Trampahan and its impact in fish growth and farm productivity had a geometric sense through the local measurement of pond areas, control water levels, and time their operations based on natural patterns reflects how math is used in everyday life outside the classroom. These math concepts embedded in constructing a Trampahan can be used as a contextualized lesson specifically in Geometry. This study, we see the presence of ethnomathematics, a mathematical idea found in their cultural practices in fishing.