SAS Congruence Demo: Constructing Congruent Triangles with GeoGebra

This GeoGebra example demonstrates side-angle-side (SAS) congruence by constructing a triangle congruent to a given one through copying two sides and their included angle. It covers triangle congruence, angle measurement, segment length, circle-based construction, and rotation. The construction uses Line, Segment, Circle, Intersect, Angle, Rotate, and Distance commands, with objects such as AC, AD, CAD, β, D'_1, and distanceCD to verify copied lengths and angles. Suitable for middle-school or high-school geometry lessons, congruence proofs, and GeoGebra construction demonstrations.