The term "spherical" refers to a shape that is perfectly round and three-dimensional, resembling a ball. In geometry, a sphere is defined as the set of all points in space that are equidistant from a central point. Common examples of spherical objects include bubbles, planets, and marbles. Spherical shapes have unique properties, such as having the same diameter in all directions and a constant curvature. In physics, spheres are often used to simplify calculations involving volume and surface area. The formula for the volume of a sphere is \frac43 \pi r^3 , where r is the radius.