Isosceles Triangle Base Angles Theorem Exploration

This GeoGebra example demonstrates that the base angles of an isosceles triangle are congruent. It involves core geometry concepts such as isosceles triangle properties, the base angles theorem, triangle congruence, and angle relationships. The construction uses GeoGebra commands Circle, Segment, Point, and Angle to generate points A, B, C, segments a, b, c, d, angles α, β, γ, and a text label text1. By constructing the triangle through circle intersections, students can interactively verify that angles opposite equal sides are equal. Suitable for middle school mathematics (grades 7–9) and introductory geometry courses, ideal for classroom demonstration or student-led discovery activities.