Middle School Geometry--Grade 7--Lesson 5: Slicing Three-Dimensional Figures

This Grade 7 geometry lesson focuses on identifying and analyzing cross-sections of three-dimensional figures. Aligned to Common Core standard 7.G.A.3, the lesson helps students understand how slicing solids—such as cubes, cylinders, cones, and pyramids—results in two-dimensional shapes like rectangles, triangles, and circles. Students explore different slicing orientations, including horizontal, vertical, and diagonal cuts, to develop spatial reasoning and geometric visualization skills. Multimedia resources from Media4Math.com support instruction through video definitions, animated sequences of slicing 3D figures, and vocabulary-rich visuals. Real-world connections to packaging design and architecture reinforce geometric applications. This comprehensive lesson includes worked-out examples, interactive warm-ups, a 10-question student quiz, and a complete answer key. 

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