Rectangle, Rhombus, Square: Geometric Construction and Classification (1)

This GeoGebra example dynamically demonstrates the geometric construction and properties of rectangles, rhombi, and squares as special types of parallelograms. The core mathematical concepts include parallelogram definitions, diagonal properties, side-angle relationships, and classification criteria for quadrilaterals. Construction details: using commands such as Segment, Circle, OrthogonalLine, Intersect, Point, and Line, the example constructs points A, B, segments a and c, circle b, perpendicular lines d and e, intersections C and D, then further perpendicular lines f, g, h, i to generate points E, F, G, H, etc., with text objects labeling each element. This resource is suitable for middle school geometry lessons to help students intuitively understand the inclusion relationships and theorems among rectangles, rhombi, and squares, and can also serve as a review tool for high school plane geometry.