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All Journal International Journal of Insights for Mathematics Teaching (IJOIMT) Journal of Innovation and Teacher Professionalism
Suliantoro, Tamyis
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Arts Education Languange, Linguistic, Communication & Media Mathematics Social Sciences Other

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The Relationship Between Initial Understanding of Flat Builds and the Ability to Determine the Height of a Triangle Rafi Muhammad, Alifiandi; Irawati, Santi; Suliantoro, Tamyis
International Journal of Insights for Mathematics Teaching Vol 6, No 1 (2023)
Publisher : Universitas Negeri Malang

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Abstract

This study explores how students' understanding of plane figures relates to their ability to determine triangle altitudes at the junior high school level. Understanding altitude determination is crucial for various math tasks. The aim is to gauge how students' initial understanding influences their ability to apply altitude concepts in math learning at the junior high school level. Data were collected from 28 eighth-grade students through a preliminary ability test (PAT) and non-routine challenge questions to determine the altitudes of right and obtuse triangles. Descriptive analysis, cross-tabulation, and chi-square tests were conducted to assess the relationship between students' initial abilities in plane figures and their ability to determine triangle altitudes. The chi-square test results show that there is no significant relationship between students' initial abilities and skills in solving PAT questions and their ability to determine the altitudes of right-angled or obtuse triangles. These findings suggest that the ability to answer PAT questions does not always mean meaning only sometimes means the ability to solve problems related to applying these concepts.
Penerapan Pembelajaran Dilatasi dengan Pendekatan Kontekstual Berbasis Etnomatematika Prastica, Axellya Dian; Suliantoro, Tamyis; Irawati, Santi
Journal of Innovation and Teacher Professionalism Vol. 3 No. 2 (2025)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um084v3i22025p340-347

Abstract

Pembelajaran matematika seringkali dirasakan kurang relevan dengan kehidupan nyata siswa, sehingga menurunkan minat dan pemahaman mereka terhadap materi. Untuk mengatasi hal ini, diperlukan pendekatan kontekstual berbasis etnomatematika yang mengaitkan konsep matematika dengan budaya lokal dan pengalaman sehari-hari siswa. Studi ini bertujuan untuk menganalisis dampak penerapan pembelajaran dilatasi melalui pendekatan etnomatematika terhadap pemahaman dan motivasi belajar siswa kelas VIII. Penelitian ini menggunakan metode eksperimen dengan desain pre-test dan post-test, melibatkan 30 siswa sebagai subjek penelitian. Instrumen pengumpulan data meliputi tes kemampuan dan angket motivasi belajar yang dianalisis menggunakan statistik deskriptif dan inferensial. Hasil penelitian menunjukkan bahwa penerapan pembelajaran dilatasi berbasis etnomatematika meningkatkan pemahaman siswa, dengan persentase ketuntasan klasikal mencapai 73,3 persen. Selain itu, hasil angket menunjukkan adanya peningkatan motivasi belajar siswa, yang merasa pembelajaran menjadi lebih bermakna dan relevan dengan kehidupan mereka. Temuan ini mengindikasikan bahwa pendekatan kontekstual berbasis etnomatematika efektif dalam meningkatkan kualitas pembelajaran matematika.
Co-Authors Prastica, Axellya Dian Rafi Muhammad, Alifiandi