The shape of a sphere.

A sphere is a three-dimensional geometric shape that is perfectly round, with all points on its surface equidistant from its center. It has no edges or vertices, and its surface is smooth and continuous. The volume of a sphere is given by the formula V = (4/3)πr^3, where r is the radius of the sphere. The surface area of a sphere is given by the formula A = 4πr^2.

- Spherical: A sphere is a three-dimensional shape that is perfectly round. It has no corners or edges, and its surface is smooth and continuous. The radius of a sphere is the distance from the center of the sphere to any point on its surface. The diameter of a sphere is the distance across the sphere through its center.