<![CDATA[ABSTRACT. This study aims to determine the improvement of students learning outcomes using problem-based learning models on rectangular material. This research was conducted in class VII SMP Satap Nanusa in Laluhe in the 2018/2019 school year. The type of research used is the pseudo-experiment “The one-shot caseâ€. The research subjects ware class VII with a total of 28 students who ware the treatment class. The instrument used as a test is a matter of essay that has been tested for validity. The hypothesis was tested using the sign test symbolized by Kai Kuadrat (X2) aided SPPS 22.0. at a significant level of  0.05 obtained t_count = 57,596 > t_table = 1,706. thus the average posttest score of 75,28 then accepts H1 which means learning rectangular material by using a problem based learning more than KBM 70.   Keywords: rectangular, problem-based learning, outcomes.]]>
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