Volume of Solid of Revolution 2

This example demonstrates how to generate a solid of revolution by rotating a planar region around an axis, and visually approximates its volume using Riemann sums. The core mathematical concept is the application of definite integrals to compute volumes of solids of revolution, specifically the disk/washer method, combined with upper and lower sum approximations. Construction details: using GeoGebra commands Segment and Circle, along with objects f, g, h, a, A, B, i, c, the example builds cross-sections and boundaries of the rotated shape. Sliders or parameters allow adjusting the rotation angle and number of subdivisions to observe how the volume approximation converges. Suitable for advanced high school or introductory college calculus students, this interactive tool helps grasp the geometric meaning of volume integrals and the idea of limiting sums.