Peningkatan Pemahaman Konsep Bangun Datar Segitiga melalui Pendekatan Realistic Mathematics Education di Kelas II SD

Abstract

Understanding the concept of students in building a flat triangle in grade II elementary school still needs to be
improved. The problem is indicated by the misconceptions of many sides being triangular elements. Some students have
not been able to understand the concept of triangle from the number of sides of the triangle. Following up on this
problem, researchers found an alternative improved understanding of the concept of triangular approach Realistic
Mathematics Education. This study aims to determine: 1) Understanding the concept of student triangle before and
after learning; 2) The process of learning to use Realistic Mathematics Education approach to learning the concept of a
triangle; 3) Improved understanding of the concept of the triangle after learning Realistic Mathematics Education; and
4) Comparison increased understanding the concept of triangular students after getting learning Realistic Mathematics
Education and students who received conventional learning. Data are based on the description of test instrument by
using a quasi-experimental control group design nonequivalent form in elementary schools in the area Manonjaya.The
research sample is determined using sampling techniques purvosive. The findings were: 1) Initial understanding of
student triangle concept was in medium category with average of 52,95 experiment class and 49,85 control class; 2)
The learning process using RME makes it easier for students to understand the concept of triangle; 3) Understanding
after learning in the experimental class is very high with a percentage of 90% superior to the control class; 4)
Understanding the concept of triangular high experimental class increased with the gain of 0.87. The increase is better
than the increase in understanding the concept of experimental class triangle.