Symmetry Demonstration by Martin Bertrand

This example demonstrates the symmetry of a figure about a point. It involves core mathematical concepts such as symmetry, angles, special points, piecewise functions, and trigonometry. The construction uses GeoGebra commands and objects like Line, Mirror, Segment, Intersect, and Angle, along with objects pic1, A, B, f, C, C', g, D, α. It is suitable for high school mathematics education to understand symmetry transformations and function graphs.