Tujuan penelitian ini untuk mengetahui apakah model pembelajaran Inkuiri terbimbing berbantuan media Geogebra berpengaruh positif terhadap kemampuan pemecahan masalah matematika siswa kelas VIII SMPN Katumbangan Lemo. Jenis penelitian ini yaitu eksperimen semu dengan bentuk nonequivalent control grup design. Penelitian ini dilaksanakan di SMPN Katumbangan Lemo tahun ajaran 2023/2024, dimana kelas VIIIC dijadikan sebagai kelas eksperimen dan kelas VIIIDsebagai kelas kontrol. Teknik Pengumpulan data dilakukan dengan cara memberikan tes kemampuan pemecahan masalah matematika dan lembar observasi. Teknik analisis data menggunakan analisis deskriptif dan analisis inferensial dengan berbantuan program SPSS 25. Analisis statistic deskriptif dengan hasil nilai rata-rata posstest kelas eksperimen sebesar 78,11 sedangkan untuk kelas kontrol diperoleh skor rata-rata posstest sebesar 70,68. Hasil analisis uji hipotesis menggunakan uji Independent Sample T-Test diperoleh nilai signifikansi 0,000 < 0,05 sehingga H0 ditolak dan H1diterima, artinya model pembelajaran Inkuiri terbimbing berbantuan media Geogebra berpengaruh positif terhadap kemampuan pemecahan masalah matematika siswa kelas VIII SMPN Katumbangan Lemo.

The aim of this research is to find out whether the guided inquiry learning model assisted by Geogebra media has a positive effect on the mathematical problem solving abilities of class VIII students at SMPNKatumbangan Lemo. This type of research is a quasi-experiment in the form of a nonequivalent control group design. This research was carried out at SMPN Katumbangan Lemo in the 2023/2024 academic year, where
class VIIIC was used as the experimental class and class VIIIDas the control class. Data collection techniques were carried out by giving tests of mathematical problem solving abilities and observation sheets. The data analysis technique uses descriptive analysis and inferential analysis with
the help of the SPSS 23 program. Descriptive statistical analysis results in an average posttest score for the experimental class of 78.11, while for the control class the average posttest score is 70.68. The results of the hypothesis using the Independent Sample T-Test, a significance value of
0.000< 0,05, was obtained so it was accepted, meaning that the guided inquiry learning model assisted by Geogebra media had a positive effect on the mathematical problem solving abilities of class VIII students at SMPN Katumbangan Lemo.