Adjacent and Non-Adjacent Angles: Concepts and Geometric Construction

This GeoGebra example demonstrates and distinguishes between adjacent angles (angles that share a common side/vertex) and non-adjacent angles (angles that do not share sides) in geometry. Using GeoGebra commands: Segment to draw points A, B, C, D, E, F forming multiple rays and line segments, and Angle command to create angle objects α, β, γ, δ, ε, etc., visually showing the relationship when two angles share a common arm versus when they do not. This example is suitable for middle school mathematics geometry teaching, helping students understand angle classification and properties, master basic geometric construction skills, and serves as a practical tool for angle concept instruction, geometric reasoning training, and classroom demonstration.