Using a Navigation Bar to Step Through Geometric Constructions

This example shows how to build a GeoGebra navigation bar that reveals a geometric construction step by step, making the reasoning process visible to learners. It focuses on constructions involving segments, orthogonal lines, circles, intersection points, and polygons, turning a static figure into an interactive sequence. The construction uses Segment to define key edges, OrthogonalLine to create perpendicular/orthogonal relationships, Circle to draw circles, Intersect to compute intersection points that drive subsequent steps, and Polygon to assemble the final shape from constructed vertices (e.g., points/objects such as A, B, C, and parameters like a, b, c, t1, c_1). Suitable for middle and high school geometry classes, self-study of classical construction techniques, and classroom activities that emphasize structured, stepwise demonstration.