Rhombus: Geometric Construction and Properties by Lera

① This GeoGebra example demonstrates the step-by-step construction of a rhombus, highlighting its defining property of four equal sides and its symmetric diagonal structure. ② Core mathematical concepts include the definition of a rhombus, perpendicular bisecting diagonals, symmetry, and relationships among vertices, midpoints, and circles. ③ Construction details: based on the summary, the commands Line, Midpoint, Circle, Intersect, and Segment are used to create points A and B, line f, circle c, intersection points C, D, E, and segments d, e, g, h, i, j, k, which together form the complete rhombus. ④ Suitable for middle school geometry lessons or introductory high school coordinate geometry, this interactive construction helps students visualize rhombus properties, practice compass-and-straightedge techniques, and explore relationships between sides, diagonals, and angles.