Angles in Similar Triangles

①This GeoGebra example demonstrates the property that corresponding angles are equal in similar triangles, using dynamic angle labels to visually compare two triangles. ②Core mathematical concepts include similarity of triangles, corresponding angle equality, and angle measurement. ③Construction details: from the summary, commands such as Segment, Point, Line, Intersect, and Angle are used, creating objects F, A, k, B, f, C, l, i, m, l_1, G, α, E, h, β, t, a. The construction builds two triangles and measures their interior angles to dynamically show the invariant angle relationships under similarity. ④This resource is suitable for middle school geometry classes or high school review, helping students intuitively grasp the angle correspondence in similar triangles, and can be used for teacher demonstrations or student self-exploration.