Area & Perimeter of Polygons

① This example dynamically constructs a polygon and its internal auxiliary lines to visually demonstrate the calculation of area and perimeter. ② Core math concepts include polygon area formulas, perimeter definition, congruence, and arithmetic operations applied to geometric measurements. ③ Construction highlights: using GeoGebra commands Polygon and Midpoint, creating objects A, B, poly1, and multiple segments (f, g, h, i, j, k, l, m) and points (C to M) to subdivide the polygon for easier measurement. ④ Suitable for upper elementary to middle school students learning basic geometry, and useful for teachers demonstrating polygon metrics interactively.