Congruent Triangles, Part 2 – GeoGebra Geometry Lesson

This GeoGebra example demonstrates how to explore the conditions for triangle congruence by constructing two triangles and using midpoints and angles. It focuses on whether given side-angle combinations uniquely determine a triangle, illustrating key congruence criteria such as SAS and SSS. The construction uses the Polygon command to draw triangles, Midpoint to create midpoints, and Angle to mark angles, with text objects (text1, text2, etc.) and variables (a, b, c, d, e, f, α, β, γ) dynamically displaying side lengths and angle measures for comparison. This resource is ideal for middle school or high school geometry classes when teaching congruence theorems, and can be used for interactive demonstrations or student-led investigations.