The word sphere comes from the Greek "sphaira" and in turn from the Latin "sphaera" which means, sphere, ball or globe, and it is a three-dimensional object in the shape of a ball, delimited by a curve and it should be noted that the points on the surface are at the same distance from the center, formed by rotating a semicircle around its diameter. The sphere has several elements that we will reveal below. First is the generatrix, which is the semicircle that generates the spherical surface; the center is the middle or central point of the semicircle; then we have the radius this is the distance from the center to a point on the sphere; chord is the section that joins the two points of the surface; the diameter is the section that passes through the center and joins two opposite points on the surface; and the poles that are the points of the axis of rotation that are on the spherical surface. You can also find the volume and area of this spherical body using formulas.
On the other hand, it is called a surface sphere where the hands of a clock rotate, or to refer to the social class or category of a person. It is also called a sphere followed by the word terrestrial to refer to the place or geometric body that the earth embodies, where the human being lives and whose surface the grouping of its lands and seas are represented. the term refers to the space in which a specific action takes place; or for a series of circumstances, and knowledge related to each other, since they have something in common.
