Abstract
This study aims to describe the facts, concepts, principles, and mathematical operations contained in the ethnomathematics of Fort Marlborough Bengkulu. This research is qualitative research with an ethnographic approach. The subjects in this study were seven: one Bengkulu history expert, two Marlborough Fort synthesizers, two mathematicians, and two Bengkulu City mathematics teachers. Data were collected through observation, interviews, and documentation. The data were analyzed through three stages, data reduction, data presentation, and conclusion. The results of the research found include, there are mathematical facts on the ethnomathematics of the Marlborough fort Bengkulu, Facts in the form of points, wake-up webs, lines, and line segments. Concepts: flat build, space build, trigonometry on the building and courtyard of Fort Marlborough. Principles: area and perimeter of plane figures, quadratic functions, volumes and surface areas of figures, trigonometric ratios: Keywords: ethnomathematics, ethnographic research, Fort Marlborough Abstrak: Tujuan penelitian ini adalah untuk mendeskripsikan fakta, konsep, prinsip, dan operasi matematika yang terdapat pada etnomatematika Benteng Marlborough Bengkulu. Penelitian ini merupakan penelitian kualitatif dengan pendekatan etnografi. Subjek dalam penelitian ini sebanyak tujuh orang yang terdiri dari, satu pakar sejarah Bengkulu, dua orang pemadu Benteng Marlborough, dua orang pakar matematika, dan dua orang guru matematika Kota Bengkulu. Data dikumpulkan melalui observasi, wawancara, dan dokumentasi. Data dianalisis melalui tiga tahapan, reduksi data, penyajian data, dan penarikan kesimpulan. Hasil penelitian yang ditemukan diantaranya, terdapat fakta-fakta matematika pada etnomatematika benteng Marlborough Bengkulu,Fakta berupa titik, jaring-jaring bangun ruang, garis, ruas garis. Konsep: bangun datar, bangun ruang, trigonometri pada bangunan dan halaman Benteng Marlborough. Prinsip: berupa luas dan keliling bangun datar, funsi kuadrat, volume dan luas permukaan bangun ruang, perbandingan trigonometri: Kata kunci: etnomatematika, penelitian etnografi, Fort Marlborough. DOI: http://dx.doi.org/10.23960/jpmipa/v23i4.pp1471-1480
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