Concentrice

Concentrice refers to a geometric arrangement where two or more objects share the same center. The most common examples are concentric circles, which are circles that lie on the same plane and have identical centers. When circles are concentric, the distance between their circumferences is uniform. This concept extends to other shapes as well, such as concentric spheres, which are spheres with the same central point. Similarly, concentric squares or polygons would share a common center.

The term "concentric" is derived from the Latin words "con-" meaning "together" and "centrum" meaning "center." This shared central point is the defining characteristic of any concentric arrangement. In practical applications, concentricity is important in many fields. For instance, in engineering, components must often be precisely concentric for proper functioning, such as gears meshing or bearings rotating smoothly. In everyday life, bullseyes on targets are a classic example of concentric circles, with the rings of color radiating outwards from a central point. The concept is fundamental to understanding spatial relationships and design principles.