The obstacles of geometric problem-solving on solid with vector and triangle approach

Abstract

The objective of this study is to analyse the obstacles of geometry problem-solving. The case focused on a male student. The object of the study was the answer of Geometry problem on solid and interview. The finding of the research is the obstacles completion categorized in representative, visual-spatial, and conceptual. Solving Geometric problem between two skew lines and triangle concept is misconception on perpendicular concept. Meanwhile, the failure of interpreting the relationship between known information and used concept with solved problem happens in vector concept. Solving Geometry problem of the distance between point and plane, object obstacle is the failure to hook between concepts, meanwhile using vector concept is conception on concept toward solving problem. In whole completion, obstacle happening is the conceptual obstacle.