Percentages-1: Rectangle

This example demonstrates how to construct a rectangle in GeoGebra and visualize its geometric properties related to percentages. Core math concepts include percentage calculations, polygon construction, arithmetic mean, straight lines, and trigonometric functions. The construction uses commands like Polygon, Value, Percentage, and objects such as points (A, B, C, D, E, F) and variables (q1, a_1, e, f, d, q2, e_1, b_1, c, f_1, G, H, I, J, q3, g, i, j, h). Suitable for middle school students and above for learning geometric constructions and mathematical applications in education.