<![CDATA[Student learning outcomes at SMP Negeri 2 Telukjambe Barat in mathematics was poor, which prompted this study. Consequently, educational tools that enhance pupils' mathematical understanding must be put into place. The purpose of this classroom action study is to determine whether the ninth graders at SMPN 2 Teluk Jambe Barat can enhance their learning outcomes by using actual object media into curved sided space constructing materials. Of the total number of pupils, 39 are female and 16 are male. The project seeks to discover how to construct curved-sided rooms using actual things at SMPN 2 Telukjambe Barat, Karawang Regency. I conducted classroom action research for two cycles. Planning, doing, observing, and reflecting are the four phases that make up each cycle. Learning results improve with each cycle; cycle (1) shows a 35,13 percent improvement. In cycle (2), however, a rise of 39,49 was seen. Results in terms of knowledge gained improve with each cycle. The average score in cycle 1 increased from 38,46 before the exam to 73,59 after the test. In Cycle 1, learning outcomes increased by 35,13%, but only 66,67 percent reached the KKM. Results showed an improvement from an average pre-test score of 43,85 to an average post-test score of 83,33 in cycle 2. A mere 87,17% of participants were able to attain the KKM in cycle 2, despite a 39,49% improvement in learning outcomes overall. Research conducted during the 2022–2023 school year at SMP Negeri 2 Telukjambe Barat's class IX A found that students' mathematical understanding of curved-sided geometric objects might be enhanced via the use of actual object media.]]>
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