The research was motivated by the resuls of extensive study of parallelogram and triangle are low. To overcome these probleme by using the approach of Realistic Mathematics Education. The purpose of this study describe the vast improvement of learning outcomes parallelogram and triangle. This research is a classroom action research, consisting of planning, implementation, observation. 76,75 RPP results first cycle, second cycle 76,78. Student activity cycle I 72,91%, 81,241% second cycle. Cognitive mastery students first cycle 61,20, 76,04 second cycle. 68,95 affective first cycle, second cycle 73,03. 69,12 psychomotor first cycle, second cycle 73,59. So PMR approach can improve the learning outcomes of a parallelogram and triangle at the Fourth Grade Elementary School 10 Abdul Rahman. Kata Kunci: hasil belajar, luas jajar genjang dan segitiga, PMR
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