Triangle Congruence Demo

This example demonstrates how to construct and visualize triangle congruence conditions and properties using GeoGebra. It involves core math concepts like congruence criteria (SSS, SAS, ASA), angle measurement, and special points. The construction uses commands like Polygon and Angle, with objects such as A_1, B_1, C_1, t1, c, a, b, A, B, C. Suitable for high school mathematics teaching to help students intuitively understand triangle congruence theorems and applications.