ASA Congruence: Constructing Congruent Triangles via Rotation and Intersection

① This example demonstrates how to construct two congruent triangles using the ASA (Angle-Side-Angle) criterion, visually confirming the congruence theorem. ② Core mathematical concepts include triangle congruence (ASA), angle measurement, segment length, rotation, and intersection of lines. ③ Construction steps: Using GeoGebra commands Point, Segment, Rotate, Angle, Line, and Intersect, points A, B, C and rotated points A', B' are created; angles α, β, γ and segments define the sides; lines and intersections determine vertices D, E, F, yielding two congruent triangles. ④ Suitable for middle school geometry lessons to illustrate congruence conditions, and as a dynamic tool for exploring corresponding parts under rotation.