Intersection of 3 Planes: Example 2

① This example demonstrates the intersection of three planes in 3D space, specifically showing the case where they meet at a single point, helping students visualize spatial relationships among planes. ② Core mathematical concepts include spatial analytic geometry, plane equations, the geometric meaning of solutions to linear systems, and conditions for a unique intersection point. ③ Construction notes: Although no specific GeoGebra commands are listed, typically one creates three planes by entering their equations (e.g., a: x+y+z=1), uses the intersection tool or solves the system to find the point, and may include sliders to adjust plane parameters and observe changes. ④ Suitable for high school or early college students studying spatial analytic geometry or linear algebra, and for teachers demonstrating the connection between algebraic solutions and geometric intuition.