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All Journal Indo-MathEdu Intellectuals Journal PEDAGOGIC: Indonesian Journal of Science Education and Technology
Kabobu, Kornelis Kura
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Education Environmental Science Languange, Linguistic, Communication & Media Mathematics Social Sciences Other

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Penerapan Konsep Matematika pada Padalu (Tempayan Air) dalam Rumah Adat Sumba Kampung Bukaregha Mesa, Yohanes Efandi Mila; Kabobu, Kornelis Kura; Lede, Yulius Keremata
Indo-MathEdu Intellectuals Journal Vol. 7 No. 1 (2026): Indo-MathEdu Intellectuals Journal
Publisher : Lembaga Intelektual Muda (LIM) Maluku

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54373/imeij.v7i1.5093

Abstract

This study was motivated by the importance of utilising local culture as a context for mathematics learning through an ethnomathematics approach. One cultural artefact that is still used by the people of East Nusa Tenggara is the padalu, or traditional water jar. This study aims to identify and analyse the mathematical elements contained in the padalu as a potential source of contextual mathematics learning. The research method used was descriptive qualitative with data collection techniques in the form of direct observation of the shape of the padalu, measurement of its parts, and visual documentation. Data analysis was carried out by linking the results of observations and measurements with relevant mathematical concepts. The results showed that the padalu represents a combination of a cylindrical shape and a hemisphere. It contains geometric and measurement concepts, such as radius, diameter, height, surface area, volume, symmetry, and size comparison. These findings indicate that padalu has strong potential to be used as a medium for contextual and meaningful local culture-based mathematics learning. Thus, the integration of padalu in mathematics learning can help students understand abstract concepts through real experiences that are close to their daily lives.
Analisis Kesalahan pada Perbandingan Trigonometri untuk Siswa Kelas X Fase E3 SMAK N ST Dominikus Sumba Barat Daya Kabobu, Kornelis Kura; Lede, Yulius Keremata
PEDAGOGIC: Indonesian Journal of Science Education and Technology Vol. 6 No. 4 (2026): PEDAGOGIC: Indonesian Journal of Science Education and Technology (In-Press)
Publisher : Lembaga Intelektual Muda (LIM) Maluku

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54373/ijset.v6i4.7052

Abstract

This study aims to analyze the errors made by Grade X (Phase E3) students at SMAK N St. Dominikus, Southwest Sumba, in solving trigonometry ratio problems, employing a descriptive qualitative method. The research subjects were Grade X (Phase E3) students, with data collected through written tests, interviews, and documentation. Data analysis involved data reduction, data presentation, and conclusion drawing by identifying, categorizing, and describing student errors based on test results and interviews. The findings indicate that the errors included conceptual, procedural, and calculation errors. Conceptual errors were characterized by an inability to understand the relationships between sides in a right-angled triangle and the application of sine, cosine, and tangent. Procedural errors were evident in unsystematic solution steps, while calculation errors stemmed from a lack of precision in arithmetic operations. Interviews revealed that these errors were influenced by a lack of understanding of basic trigonometric concepts, insufficient practice, and low precision in calculations. Overall, the findings suggest that mastering basic concepts is the primary factor that needs to be strengthened to reduce student errors in solving trigonometry problems.
Co-Authors Keremata Lede, Yulius Mesa, Yohanes Efandi Mila