Concept in Definition ABC

A circle is understood to be that geometric figure that consists of a shape established from a curved line closed. The circle has a main characteristic that is that all the points that are established from its center have the same distance towards the line that serves as perimeter, that is, they are equidistant. An important clarification in terms of what a circle represents is that which shows us that the circle is the surface of the plane inside a circumference. Thus, the circumference is the limit or the perimeter of the circle, a limit established by a closed curved line. Therefore, both terms should not be confused or taken for the same, although in the language This mistake is common.

The circle is one of the geometric figures more basic around which other figures, for example the cone. It is the only one that does not have any straight line as a determinant and therefore the angles that are can establish within it necessarily require the marking of internal straight lines imaginary. In the circle, as in the circumference, there are therefore no vertices.

There are several concepts that are important when it comes to analyze or define the specific characteristics of each circle. In this sense, we must always speak of radio when we speak of a circle. The radius is the segment that is established between the center of the circle and any of the points on the circumference. So that we can speak of a circle proper, all the segments that we establish between the radius and the circumference must have the same length, that is, be equidistant from the radius and the circumference or perimeter.

Another important concept is that of diameter. The diameter is the length of the circle if we draw a segment from one point to another point on the circumference, always passing through the center. Since it must always be the same length, regardless of where we draw the diameter, this segment should, as a result, allow us to divide the circle into two parts of equal size or surface. The diameter, in short, is the union of two spokes. Finally, if we mark two different radii, perpendicular to the circle and extend them to the circumference, the distance that is marked on it between one and the other is known as the arc. The arc does not pass through the center of the circle. The chord is a segment that joins two points on the circumference without touching the center.