 | Cross-Sections of 3D Figures | 3-Lesson UnitThis collection of geometry lesson plans explores how slicing three-dimensional figures produces different cross-sections. Through hands-on activities, real-world examples, and animated visuals, students will investigate how horizontal, vertical, and diagonal slicing planes affect various 3D shapes, including cubes, cylinders, cones, rectangular prisms, spheres, pyramids, triangular prisms, antiprisms, and tetrahedrons. Each lesson focuses on a specific set of geometric figures, guiding students through the process of identifying and analyzing the resulting cross-sections. Students will learn how slicing a cylinder creates circular or rectangular cross-sections, how a pyramid produces triangles or trapezoids, and how an antiprism forms polygonal cross-sections. The collection also includes an exploration of volume, with a focus on the triangular prism and how its volume is calculated using stacked cross-sections. These structured lessons feature warm-up activities, guided instruction, worked-out examples, review sections, and quizzes to reinforce student learning. Designed to align with Common Core geometry standards, these lesson plans help students develop spatial reasoning and apply geometric concepts to real-world contexts. Subscribers to Media4Math can access and download this complete lesson plan collection in PDF format for seamless integration into their curriculum. |