Rectangle Sum Slider Demo

This example demonstrates the relationship between rectangle areas and curve using sliders; involves core math concepts like rectangles, function curves, tangent lines, centroids, and parabolas; constructed with GeoGebra commands/objects such as Textfield, RectangleSum, f, InputBox1, a, b, p, n, c; suitable for high school mathematics teaching to understand function graphs, tangents, centroids, etc.