Triangle Median Line and Circle Arc Construction

This example demonstrates how to construct triangle median lines and related circular elements using GeoGebra. The core mathematical concepts include properties of triangle median lines, drawing circle arcs and sectors, and geometric rotation with angle measurement. Construction points: Use Point command to define key points A, B, etc., use Segment to draw line segments forming triangles, use Ray to draw rays for direction, apply Rotate command for rotation, use Circle, CircleArc, CircleSector to draw circles, arcs and sectors respectively, and calculate area and circumference of circular regions with Area and Circumference commands. Text input boxes and fraction text are used for dynamic numerical display. This example is suitable for middle school geometry teaching, helping students understand median lines and circle properties, serving as a practical case for comprehensive applications of geometric transformations and circles.