SSA Congruence Theorem Exploration Activity

① This example demonstrates how to construct triangles with two given sides and a non‑included angle in GeoGebra, visually showing that the SSA condition can yield zero, one, or two possible triangles. ② Core mathematical concepts: triangle congruence criteria, the SSA ambiguous case, relationships between angles and side lengths, and geometric transformations. ③ Construction highlights: Points (A, B, C, D, etc.) created with Point; sides and rays drawn with Segment and Ray; the given angle α marked with Angle; the ray rotated about a point using Rotate to generate possible third vertices; objects involved include A, B, A′, α, C, D, a, E, F, b, c, d. ④ Suitable for high‑school geometry lessons, student inquiry, or teacher demonstrations of the SSA counter‑example.