Ethnomathematics in Balinese culture as a learning material for logic and reasoning geometry

Abstract

Indonesia's inVolvement in international tests, one of which PISA (Program for International Student Assessment), shows that Indonesia learners are less capble of using mathematical concepts to solve problems associated with real life. This is because these students tend to be taught practical formulas that will be used to answer questions in the exam. This research aimed at describing ethnomathematics in some Balinese cultural elements; ceniga, the yard size based on asta kosala-kosali, and also the pattern of Legong dancer position. Those three cultural elements were used because it is appropriate with plane figure geometry material for seventh grade students and further it is hoped to create ethnomathematics-based geometry problems. This research was a descriptive qualitative. The data were collected by conducting Balinese culture based geometry test to know the seventh grade students' logic and mathematics reasoning ability that had been chosen as the subject of the research based on the performance rubrics. The results of research show that there are significant mathematical abilities of students to logic and reasoning in solving geometry-based culture of Bali.