Verifying Perpendicularity of Vertical Edges in a Cuboid

This GeoGebra example demonstrates how to verify the perpendicularity of vertical edges in a cuboid. Using GeoGebra commands including Translate, Polygon, Segment, PointIn, Point, and Angle, the construction creates a cuboid model with key vertices A, B, C, D, edges a, f, g, h, i, j, and angle α to precisely measure and verify perpendicular relationships. The construction incorporates polygon objects and text labels to visually present the geometric principles of perpendicularity between lines and planes in solid geometry. This example is ideal for secondary school solid geometry instruction, helping students understand the geometric properties of prisms and master methods for verifying perpendicular relationships. It serves as an excellent demonstration resource for geometry construction teaching.