An illustration of a sphere showing diameter, arcs, and circles. A sphere is a solid bounded by a curved…

Illustration of a sphere generated by the revolution of a semicircle ACB about its diameter AB as an…

An illustration of a sphere showing a radius of 1 foot. Illustration could be used for calculating volume.

An illustration of a zone of a sphere. A zone occurs when a sphere is cut by parallel planes that are…

An illustration of a zone of a sphere. A zone occurs when a sphere is cut by parallel planes that are…

Right triangle inscribed in semicircle. Illustration shows that the perpendicular from any point in…

A wheel is a circular device that is capable of rotating on its axis, facilitating movement and transportation.