Sukirwan, Darhim, T. Herman, R.C.I. Prahmana
The main objective of this research is to analyze the student's mathematical argumentation when dealing with geometry. The method is used qualitative method with grounded theory to know how the students provide an explanation or an answer against claims so that the quality of the vernacular students will be drawn up with clear from how students compose a series of arguments. The results showed that there were still many students basically experiencing constraints in argumentation, but the quality of the reasoning appears to be a variation of the argument appeared, include: inductive, algebra, visual and perceptual. In addition, the starting point of the students composes a series of arguments generally starts from claims that arise in a matter. Proof of claim further builds upon the relationship between the characteristics of data with mathematical objects that appear in the acquired mathematical knowledge from previous students. Relationship spelled out in a series of statements and reasons which support the claims through the fourth argument. © Published under licence by IOP Publishing Ltd.
Universitas Sultan Ageng Tirtayasa, Jl. Jakarta Km. 4, Serang, 42121, Indonesia; Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi 229, Bandung, 40154, Indonesia; Universitas Ahmad Dahlan, Jl. Pramuka Kav. 5, Yogyakarta, 55161, Indonesia
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