Dynamic Simulation of Vector Addition and Subtraction

① This GeoGebra example dynamically simulates vector addition and subtraction, visually demonstrating how two vectors combine or decompose geometrically. ② Core mathematical concepts include vector addition, subtraction, parallelogram law, triangle law, vector magnitude, and direction angles. ③ Construction highlights: uses Vector command to create vectors u, v, w; Intersect to find intersection points; Angle and Segment to construct angles and sides; Textfield and InputBox for interactive input; buttons for control; objects include points A, B, C, D, E, F and parameters Θ_1, Θ_2, r_1, r_2 for parametric dynamic adjustment. ④ Suitable for high school or early college students learning vector operations, and useful for teachers in classroom demonstrations or for students' self-exploration of vector properties.