Scaffolding profile in solving geometry problems in terms of van Hiele level

Abstract

Solving the geometry problem is not an easy matter for some students. In addition to relying on understanding concepts, problem type exercises, scaffolding is also considered important to assist students in solving geometry problems. This study looked at the scaffolding process for students in solving geometry problems in terms of the van Hiele level. There are three groups of research subjects with each group of subjects representing students who have the ability of geometry at the visual, analytical, and informal deduction levels at the van Hiele level. The research method used is descriptive qualitative. Qualitative methods are used to analyze the subject scaffolding at each level of van Hiele in solving geometry problems. The results of the study found that subjects with a visual level tend to solve problems by presenting them in the form of images without observing in-depth the concepts used. So it takes scaffolding in terms of image presentation, mathematical concepts, and problem-solving flow. Subjects with the level of analysis identify the nature of the wake in the problem to determine the mathematical concepts used. Scaffolding is needed in the form of image presentation and problem-solving flow. While subjects with an informal level of deduction can determine the mathematical concepts used by first looking at the properties of the image. However, subjects at this level still need scaffolding in the problem-solving flow.