Sections of a Triangular Prism

① This example dynamically demonstrates the cross-sections formed when a triangular prism is cut by a plane, illustrating the relationship between cutting planes and polyhedra in solid geometry. ② Core mathematical concepts include the structure of a triangular prism, intersection lines (sections) between a plane and the prism, orthogonal relationships in 3D space, and dynamic variation of the section. ③ Construction highlights: using GeoGebra commands such as Polygon and Prism to build the prism, PointIn to place points on the prism, Translate and Rotate for spatial transformations, Plane to define the cutting plane, IntersectPath to obtain the intersection curve, OrthogonalLine for perpendicular auxiliary lines, and multiple text objects (text1 to text9) for labeling and explanation. ④ Suitable for high school solid geometry classes or introductory university spatial analytic geometry, ideal for classroom demonstrations of section properties, spatial visualization training, and dynamic exploration.