This is the 5816th most frequent Russian word.
радиус
Radius.
Here, 'радиус' is used in a mathematical context, referring to the distance from the center to the edge of a circle.
Радиус круга можно найти, если известна его площадь.
The radius of a circle can be found if its area is known.
In this sentence, 'радиус' describes the area within a specific distance from a central point, used in everyday spatial contexts.
В радиусе одного километра от дома есть несколько магазинов.
Within a radius of one kilometer from the house, there are several shops.
Here, 'радиус' is applied in a technical context related to the specifications of a vehicle's turning capability.