KEMAMPUAN PEMBUKTIAN MATEMATIS SISWA KELAS IX PADA MATERI KEKONGRUENAN SEGITIGA MELALUI STRATEGI FLOW PROOF
Daftar Isi:
- The purpose of this study is to describe and categorize mathematical proof of class IX students on triangle congruence through flow proof strategy. Mathematical proof on congruence is a prerequisite to develop skills in constructing formal proof in mathematics. The subject in this study are 25 students of SMP Negeri 33 grade IX.1. The type of this research is descriptive. The Learning process implemented with flow proof strategy, namely re-writing existed information, stating what is needed to be proved, using existed rules such as postulate and definition, and writing the consequence from used rules. Data were collected by a test with three questions and interviews. The results show that students know in writing the proofs the first step is identify the problem such as what known and what will be proved after the implementation of flow proof strategy and students’ ability on congruence proving in class nine SMP N 33 Palembang categorized sufficient, with 4% of the students categorized as excellent, 16% in good, 48% in sufficient, 24% in less, and 8% in poor category. Generally, students’ obstacle in proving is in determining rules that will be applied for constructing a proof and not understand what is to be proof. Other error in proving is writing symbols.