Mr. Meli's Sample Isosceles Trapezoid

① This example demonstrates how to construct an isosceles trapezoid in GeoGebra and visualize its geometric properties. ② The core mathematical concepts include the definition of an isosceles trapezoid (equal legs, equal base angles), symmetry, and basic polygon properties. ③ Construction highlights: Based on the construction summary, commands such as Circle, Line, Point, Intersect, and Segment are used, creating objects like A, B, C, D, E, F and texts text1, text2. The vertices are determined by intersections of circles and lines, then connected by segments to form the trapezoid. ④ Suitable for middle school geometry lessons to intuitively understand isosceles trapezoid properties, and also as a basic GeoGebra construction exercise.