Visualizing a Rectangle Enclosed by y=4-x^2

This example demonstrates how to visualize a rectangle enclosed by the function y=4-x^2 using GeoGebra. It involves core mathematical concepts such as function graphs, coordinate geometry, geometric construction, and optimization. The construction uses GeoGebra commands like LaTeX for text and Segment for drawing lines; objects include the function f, text1, variable a, points A, B, C, D, and lengths b, c, d, e. It is suitable for high school students to learn and understand the integration of functions and geometry, ideal for classroom teaching or self-exploration.