Application of Problem Based Learning to Increase Students’ Problem Solving Ability on Geometry in Class X SMA Negeri 1 Pagaran

The purpose of this research are: (1) To know the improvement of problem solving ability of students, (2) To know the improvement of problem solving ability of mathematics students by applying Problem Based Learning Model on geometry topic. The approach of this research is a classroom action research. Subjects in this study were students of class X-6 of SMA (Tenth Year Senior High School) Negeri 1 Pagaran totaling 30 students. The result of data analysis after giving of action in cycle 1, it was obtained 70% classical completeness; medium problem solving ability category. In the second cycle obtained 90% classical completeness. The category of problem solving ability is very high. Based on the results of data analysis, it can be concluded that the problem-based learning model can improve mathematics problem solving ability