Ethnomathematics on the Tutup Ari of the South Tapanuli Regent’s Office Building

Abstract

This study aimed to discover the shape or mathematical concept of the ornaments found on the Tutup Ari of the South Tapanuli Regent's Office building. The ornaments on the tutup are one of the Mandailing cultural customs which must be preserved because they contain their own meaning and significance in each form. These ornaments can be found in various areas of Southern Tapanuli, one of which is in South Tapanuli, to be precise, in the South Tapanuli Regent's Office building. The ornaments on the tutup ari can be used as a medium for learning mathematics at school so that learning mathematics at school can be started by introducing the surrounding customs and culture. This paper explores the mathematical ideas contained in the ornaments on the tutup ari of the South Tapanuli Regent's Office building. The discussion is descriptive in nature, giving an overview of the ornaments in detail. The results of the exploration and analysis of these ornaments found that there are mathematical concepts in the form of flat geometric shapes such as triangles, trapezoids, parallelograms, rhombuses, squares, and rectangles.