radius

这个圆的半径是5厘米。

The ___radius of this circle is 5 centimeters.

医生在X光片上确认她的桡骨骨折了。

The doctor confirmed her ___radius was fractured on the X-ray.

公园周围两公里半径内禁止停车。

Parking is prohibited within a 2-kilometer ___radius of the park.