半はん径けい

noun

radius

Geometric term for the distance from the center of a circle or sphere to its circumference. Also used figuratively for a surrounding area or range.

• この円えんの半はん径けいは5センチです。

  The radius of this circle is 5 centimeters.

• 駅えきから半はん径けい500メートル以い内ないに住すみたい。

  I want to live within a 500-meter radius of the station.