Triangle Geometric Construction Demo

This example demonstrates how to construct triangles in GeoGebra from given conditions such as three sides, two sides and the included angle, or two angles and the included side. Core mathematical concepts include triangle congruence criteria, intersection of segments and circles, vector representation in the coordinate plane, and symmetry. Construction highlights: although no explicit commands are provided, the typical workflow uses basic objects like Point, Segment, Circle, Polygon, and Intersect, and can be combined with a Slider for dynamic illustration. Suitable for middle‑school geometry instruction, high‑school analytic geometry review, and teacher lesson preparation.