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All Journal Jurnal Didaktik Matematika Jurnal Penelitian Pendidikan IPA (JPPIPA)
Munira Ulfa
Universitas Syiah Kuala
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Materials Science & Nanotechnology Mathematics Physics

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Students’ Errors in Solving Plane Geometry Problems Using E-Learning-based Diagnostic Tests Mukhlis Hidayat; Tuti Zubaidah; Munira Ulfa; Elizar Elizar
Didaktik Matematika Vol 10, No 1 (2023): April 2023
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (689.838 KB) | DOI: 10.24815/jdm.v10i1.31938

Abstract

During the Covid-19 pandemic, the implementation of online and shift learning systems has been identified as one factor contributing to learning loss in mathematics problem-solving skills specifically in plane geometry problems. The primary objective of this research was to investigate the different types of errors committed by junior high school students in Banda Aceh, Indonesia, in solving plane geometry problems using e-learning diagnostic tests. A descriptive qualitative approach was adopted, and 24 Year 8 students were selected as subjects. The data were collected through tests and interviews, and data analysis involved data reduction, data presentation, data verification, and drawing conclusions. The findings revealed that the percentage of students' errors in solving conceptual problems, principal problems, and verbal problems were 76.39%, 68.75%, and 75%, respectively. Subsequently, the results from the second test and interviews with six students showed that students encountered several conceptual errors, including errors in stating angle symbols, errors in identifying the type of shape provided, errors in deducing information regarding properties, perimeter, and area of plane geometry, lack of knowledge regarding the application of the appropriate plane geometry formula, and inability to solve problems using the correct procedure. Principal errors were related to algebraic operations, while verbal errors involved translating problems and improper application of concepts and principles. The understanding of the types of errors will help teachers detect errors made the students early.
Effect of Ethanol Extract of Sugar Apple (Annona squamosa L.) Stem Bark on Rat SGPT and SGOT Masykur Masykur; Nurdin; Lukman Hakim; Rosnizar; Widya Sari; Munira Ulfa; Novi Yana Sari; Ria Ceriana
Jurnal Penelitian Pendidikan IPA Vol 9 No 10 (2023): October
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i10.4773

Abstract

This study aims to compare hepatoprotector potency of the ethanol extract of sugar apple (A. squamosa) stem bark (EESSB) against the enzyme activity of SGOT and SGPT in rats induced by toxic doses of paracetamol. The method used in this study is Completely Randomized (CRD) consisting of 6 treatment groups and 3 replications. The parameters that are being observed in this study are phytochemical, antioxidant, clinical symptoms, macroscopic, SGOT and SGPT rats. Data were analyzed using Analysis of Variance (ANOVA) with a significant level of 5% with the Duncan test as a follow-up test. The clinical and macroscopic symptoms of rat liver including changes in color, surface structure and consistency as well as relative organ weight. Data were analyzed using ANOVA significant level 5% and Duncan's test as a follow-up test.  Extracts contains alkaloid, steroid and phenolic compounds. The results showed that there was a significant difference (P <0.05) in the levels of SGOT and SGPT after giving ethanol extract of stem bark A.squamosa (EESSB). Based on the results of the study, it was concluded that all EESSB doses had the potential to reduce the levels of AST and ALT in paracetamol induced rats. The results showed that there was a significant difference (P <0.05) in the macroscopic changes in the liver based on changes in color and degree of liver damage. Relative organ weight had no significant effect (P> 0.05). The ethanol extract of  A. squamosa (EESSB) stem bark has the potential to be a hepatoprotector, however a dose of 150 mg/kg BW is a more effective dose as a hepatoprotector against paracetamol.
Co-Authors Elizar Elizar Lukman Hakim Masykur Masykur Mukhlis Hidayat Novi Yana Sari Nurdin Ria Ceriana Rosnizar Tuti Zubaidah Widya Sari