A sphere is a three-dimensional geometric object that is perfectly round and symmetrical in all directions. It is defined as the set of all points in space that are at an equal distance (the radius) from a central point.
Spheres are common shapes found in nature and in human-made objects. For example, many fruits such as apples, oranges, and grapefruits are shaped like spheres. Similarly, ball bearings, bubbles, and some types of lamps also have a spherical shape. In the field of astronomy, planets and stars are often modeled as spheres. The unique properties of a sphere make it an essential shape in fields such as physics, engineering, and architecture.
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