Analisis Kemampuan Berpikir Geometris Siswa Sekolah Dasar Di Kota Depok Dodi Lesmana(a) ,Mira Amelia Amri(b), Puryati(c)
Universitas Negeri Jakarta
Universitas Terbuka
Abstract
This study aims to identify the geometric thinking abilities of fifth-grade elementary school
students on the subject of flat shapes and their properties, as well as to describe these
abilities based on three indicators: visualization, analysis, and informal deduction, while also
describing the factors that influence them. This study uses a mixed methods approach with
an explanatory sequential design, administering tests to 75 students as a sample of the
population of fifth-grade students at public elementary schools in Depok City, supplemented
with interview data to deepen understanding. Quantitative data showed that students^
geometric thinking skills were still low, as indicated by the percentage of correct answers for
visualization skills (36%) and analysis and informal deduction skills (only 4%). Qualitative
data reinforced these findings. The interview results explained that students had difficulty
understanding geometry because the material was abstract, there were many properties that
had to be memorized, and the teachers^ explanations were ineffective with imprecise
drawings.
Keywords: geometric thinking, mathematics, primary school
