radius
SEGMENT IN A CIRCLE OR SPHERE FROM ITS CENTER TO ITS PERIMETER OR SURFACE AND ITS LENGTH
Radii; Radius (geometry); Curve radii
(n.) = radio, área, zona
Ex: The fact that the library can only attract people within a relatively small radius means that it has no alternative but to serve whoever lives -- or works -- in that radius.
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* radius of + Posesivo + action = radio de acción
* within a + Distancia + radius = en un radio + Distancia