Side-Angle-Side Triangle Congruence Practice (IM Geo 2.6)

① This example demonstrates how to determine triangle congruence using the Side-Angle-Side (SAS) criterion, presented as a practice exercise. ② The core mathematical concept is the SAS congruence theorem: if two sides and the included angle of one triangle are equal to the corresponding parts of another triangle, then the triangles are congruent. It also covers corresponding sides, corresponding angles, and the congruence symbol. ③ Construction notes: Based on the construction summary, the example uses an image object (pic1) as the problem background or visual aid, likely containing static triangle diagrams for comparing side lengths and included angles. In GeoGebra, one can construct triangles using segment and angle tools, then use measurement tools to verify the SAS condition. ④ This is suitable for middle school geometry, as a classroom practice or homework after learning triangle congruence theorems, and can also serve as a visual demonstration for teachers.