Interactive GeoGebra Sphere Construction

This GeoGebra example demonstrates how to construct and manipulate a sphere (3D ball) interactively, illustrating how the resulting sphere is determined by key spatial parameters. It supports understanding of solid geometry fundamentals: the sphere object itself, the role of a center point and a radius, and how geometric relationships in 3D can be built from simpler primitives. Construction-wise, it uses GeoGebra commands PointIn, Circle, Segment, and Sphere, combining intermediate objects (including C, A, c, r, a, P, f) to create the final sphere from a point/constraint-driven setup. Suitable for middle/high school and early university learners, it works well for teaching 3D solid geometry concepts and for interactive visualization/modeling practice.