GeoGebra Direct Measurement Example: Polygon Construction and Area Calculation

This example demonstrates direct measurement in GeoGebra. It first uses the Segment command to construct the sides of a polygon by connecting points, then applies the Polygon command to create a closed polygon from points O, P_4, P_2, P_3, etc. The construction summary shows various geometric objects including points D and E. This范例 illustrates the core workflow of basic geometric construction: points → segments → polygons. Users can directly obtain measurement results such as area and perimeter through GeoGebra's measurement tools. Ideal for middle school math teachers demonstrating polygon construction or students practicing geometric drawing and measurement skills.