Rotations Demo for Pre-Algebra

① This GeoGebra example dynamically demonstrates the rotation of a polygon (triangle) around a point, showing how the shape moves and preserves its size and form. ② The core mathematical concept is the rotation transformation in plane geometry, including the center of rotation, angle of rotation, and the correspondence between original and rotated points and sides. ③ Construction highlights: The original triangle is built using the Polygon command with vertices A, B, C; the Rotate command generates rotated copies (A', B', C', etc.), and the original sides (a, b, c) are paired with rotated sides (a', b', c'); multiple rotations (e.g., A'_1, B'_1) illustrate successive transformations, with auxiliary segments d, e, f possibly used for reference. ④ This is ideal for pre-algebra or introductory geometry students, serving as an interactive visual aid for teachers or a self-exploration tool to grasp the intuitive meaning of rotation, preparing for coordinate geometry, symmetry, and more advanced transformations.