Three Planes Intersecting Along Distinct Lines

This example demonstrates the geometric phenomenon of three planes intersecting along distinct lines in 3D space. Key math concepts include solid geometry, vector operations, and the relationship between spatial lines and planes. The construction uses GeoGebra commands: OrthogonalVector to generate orthogonal vectors a, b, u, v, c, w, which are used to define plane normals and intersection lines. Suitable for high school students and above learning 3D geometry, vector interactions, and spatial图形 relationships, also applicable for university foundational geometry education.