Cylinder Cross Sections Investigation: Slicing Pyramids with Different Bases

This GeoGebra example dynamically demonstrates how cross sections change when a plane slices through pyramids with different base shapes, as well as a cylinder. It visually illustrates the concept of a cross section in solid geometry—the region enclosed by the intersection curve between a plane and a solid. Core mathematical concepts include cross sections of 3D solids, properties of pyramids and cylinders, and the geometric relationship between a cutting plane and a solid. The construction uses commands such as Intersect to find intersection points between the plane and pyramid edges, Cylinder to create the cylinder, IntersectPath to generate the cross-section path, and PointIn and If to control dynamic point visibility. This example is suitable for high school or early college students learning about cross sections in solid geometry, and also serves as an effective classroom demonstration tool to enhance spatial reasoning.