User:Alua Koblan/A geometric body

A geometric body is a limited three-dimensional set of spatial points, separated by parts of flat or curved surfaces with a limited circumference(sides) and containing these boundary parts themselves. That is, a region bounded by a three-dimensional Euclidean closed space. The Union of all boundary points is said to be the outer surface of the body. That is, the border of the body will be its surface. Some bodies have a part of the boundary surface called the sole, for example, the parallel surfaces of a paralepiped, truncated pyramid, and truncated cone are called Paws. Boundary surfaces of a geometric body, other than the mentioned soles, are called side surfaces of the body. For bodies with a flat border, segments lying at the intersection of two boundary surfaces are called body faces. If the fins lie on the soles of the body, they are called the paw fins, others are called the lateral fins of the body. The area of the outer side of the boundary surfaces of a body is called the area of the outer surfaces. This area will be equal to the sum of the areas of the boundary surfaces. It is equal to the sum of the area of the side surfaces and the area of the sole surfaces. The sum of the area of the side surfaces and the area of the foot surfaces is called the area of the full face(full face).

If spatial shapes are bodies, straight lines, planes, flat shapes, and surfaces are not considered geometric bodies. In the "foundations" of Euclid, a definition is given that "what is a body has length, width, and Terence."

Resources
The world of Mathematics: a mathematical subject encyclopedia for students and students of General secondary educational institutions(schools, gymnasiums, colleges, lyceums), as well as for fans of mathematics and the general public. "I Don't Know," he Said.