Rotation Matrix Demonstration

This example demonstrates the matrix representation of rotations in a 2D plane; involves core concepts like rotation transformation, matrix operations, complex number representation, and coordinate geometry; construction highlights include using Point and CircleArc commands, defining objects like angle α, radius r, point A, vector e; applying matrices mA, mB, mC for rotation transformations; and utilizing sliders for animated demonstrations; suitable for high school students learning the geometric and algebraic aspects of rotations.