Ethnomathematics is mathematics that grows and develops in a particular culture. Technological advancement makes culture more forgotten, especially in traditional buildings such as traditional houses. Traditional houses contain philosophical values that are used as guidelines for the life of the surrounding community. Unconsciously in traditional house buildings have applied various mathematical concepts in the building. This study aims to reveal the mathematical concepts and philosophical values found in the traditional Toba Batak houses. The method of research conducted in the ethnographic approach. The source of research data was obtained from three speakers: customary kings, building experts, and residents (elders). The instruments in this study were researchers themselves and guidelines for semi-structured interviews—data collection techniques obtained from observation, discussions, and documentation. Testing the validity of the data is done by source triangulation. In this study, it was found that there was an application of mathematical concepts in traditional Toba Batak houses. The mathematical theory consists of a dimensional geometry concept, two-dimensional geometry, three-dimensional geometry, geometric transformation, and number patterns. Each of the forms contained in the traditional Toba Batak house contains philosophical values that are used as learning resources.
Turi-turian Sigale-gale and tungkot Tunggal Panaluan are local wisdom of Toba Batak culture. To develop the structure of the sigale-gale and the single-limb it is necessary to understand the forming structure and contain the didactic values. So it can be applied and passed down for the next generation. This study aims to describe the structural elements and didactic values of the Toba Batak tourism "Sigale-gale" and "Tungkot Tunggal Panaluan". The method used in this research is descriptive qualitative. The data collection techniques are observation, documentation, and interviews. The Toba Sigale-gale Batak tour and Tungkot Tunggal Panaluan have the theme of an object that has magical powers. The plot used in the Toba Batak folklore is the forward plot. The dominant characterizations in Batak tours of Toba Sigale-gale and Tungkot Tunggal Panaluan are direct depictions by the authors and depictions by other characters. The more dominant place and atmosphere settings are found in the Batak folklore of Toba Sigale-gale and Tungkot Tunggal Panaluan. In the Sigale-gale and Tungkot Tunggal Panaluan tours, they also have varying mandates, as well the didactic values contained in the Sigale-gale and Tungkot Tunggal Panaluan tours are social, religious, cultural and moral values.
This research describes the meaning of symbols, symbols, or signs contained in the Batak Simalungun wedding ceremony as a semiotic study. Symbols, symbols, or signs can be identified the meaning, use and benefits in the implementation of marriage customs for the Batak Simalungun community which need to be preserved as one of the local wisdom. The meaning of symbols, symbols, or signs is part of the semiotic approach which is the binding factor in his studies. The sign aims to simplify thoughts or ideas to facilitate communication which contains meaning, values, norms, or certain intentions that must be obeyed by the Simalungun Batak community, especially in the Sindarraya area. The signs found in the Simalungun Batak wedding ceremony are mangalo-alo boru na bayu, boras tenger, tondong welcome (mangalo-alo tondong), tombuan na marappang-appang, ambanganni tondong na baru, groceries, jambar, partadingan manurdukhon, tobus huning, panruttuki, uluni omas / tintin marakkup, suhuni appang, padaskon hiou holong, hiou parsimatuaon and panukkunan dishes.
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