Prove Congruence 4

This example demonstrates how to construct and prove the congruence of polygons using GeoGebra. Core mathematical concepts involved include congruence, trigonometric functions, fractal geometry, perimeter, and optimization problems. Key construction steps involve using the Polygon command and objects such as A, B, C, poly1, c, a, b, G, H, I, poly3, i, g, h. Suitable for high school mathematics teaching and geometric construction practice.