Triangle in the Mirror

This example demonstrates the symmetry of an equilateral triangle under mirror transformations. It involves core mathematical concepts such as reflection, equilateral triangles, geometric transformations, and complex numbers. The construction uses GeoGebra commands like Line, Polygon, and Mirror, with objects including points A, B, m, C, D, E, t1, e, c, d, E', D'. Suitable for high school mathematics teaching to understand geometric transformations and symmetry.