Pentagon Reflection Puzzle

This example demonstrates how to reflect a pentagon across a line of symmetry, intuitively showcasing the congruence property of geometric reflection. The core mathematical concepts include axial symmetry, reflection transformation, and congruent figures. Construction details: Use the Polygon command to draw the initial pentagon ABCDE, the Line command to define the axis of symmetry, and the Mirror command to reflect the pentagon across the axis. The reflection preserves the shape and size completely, verifying the invariance of reflection transformation. This example is suitable for middle school students learning symmetry and congruence, as well as high school math demonstrations of geometric transformations.