Area & Perimeter: Interactive Polygon Measurement Tool

① This example demonstrates an interactive polygon area and perimeter measurement tool, where users can adjust side lengths or vertex positions via input boxes and observe real-time changes in area and perimeter values. ② Core mathematical concepts include polygon area calculation, perimeter definition, distance measurement, and dynamic linkage between variables and formulas. ③ Construction highlights: using GeoGebra commands such as Polygon to create polygon poly1, PointIn and Distance to compute side lengths and diagonal distances, Textfield and InputBox for user input, and text objects Textq1, Textpoly1, TextJH linked to values for dynamic updates. ④ Suitable for middle school to high school students learning geometric measurement and the integration of algebra with geometry, as well as for teachers demonstrating how area and perimeter vary with shape changes.