The Development of Learning Tool Models on Triangle using Problem Solving Based of Rigorous Mathematical Thinking in Wijaya Kusuma Surabaya University

Geometry learning given to Mathematics education program, Faculty of Language and Science, Wijaya Kusuma SurabayaUniversity use various strategy and learning models even acquired maximum result. Students still have difficulties this to prove theorems, therefore concepts understanding is needed about triangle. One of the alternatives that can build up geometry concepts in students mains is by carrying out an approach of Rigorous Mathematical Thinking (RMT). The goals of this research are to describe processes and results of the development learning tools models of triangle using problem solving based on Rigorous Mathematical Thinking (RMT). This Research is a developmental one which carried out for the students of Mathematics education program, Faculty of Language and Science University of Wijaya Kusuma Surabaya academic year 2017-2018. The research object is learning triangle using problem solving approach. Two subjects are subject for validation and subject for limited try out. The learning instruments consist of validation sheets, observation of students activity sheets, students response sheets and test. The technique of data collection uses observation method, test, and questionnaire. Research yields teaching handbook, syllabus and student activity sheets.