Mathematical Reasoning Abilityin Geometry Learning Based on A Realistic Approach Assisted by AI for Students of hhe Mathematics Education Study Program in State University of Medan

Abstract

This study aims to improve students' mathematical reasoning abilities in geometry learning that integrates a realistic approach with an Artificial Intelligence (AI) platform. This research was conducted at the Mathematics Education Study Program, Department of Mathematics, Faculty of Mathematics and Natural Sciences, Medan State University in the odd semester of the 2025/2026 academic year with a design research model by Freudenthal. The subjects of the study were 26 students from the PSPM class of 2024 and 25 students from the MESP class of 2024 taken by purposive sampling. The learning process was carried out in 12 meetings with 4 tests. The results showed that the mathematical reasoning ability of PSPM class students reached an average of 75.2 with a classical completeness of 92%. Meanwhile, the mathematical reasoning ability of MESP class students reached an average of 87.0 with a classical completeness of 100%. Thus, geometry learning based on a realistic approach assisted by AI can improve students' mathematical reasoning abilities and can strengthen the mathematical proof and argumentation abilities of students in the Mathematics Education study program, Medan State University.