説明中心

radius

[ˈreɪdiəs]

radius Definition

  • 1a straight line from the center to the circumference of a circle or sphere
  • 2an area that is within a particular distance from a central point

Using radius: Examples

Take a moment to familiarize yourself with how "radius" can be used in various situations through the following examples!

  • Example

    The radius of the circle is 5 cm.

  • Example

    The explosion damaged buildings within a radius of several miles.

  • Example

    The store offers free delivery within a 10-mile radius.

  • Example

    The park has a radius of 2 kilometers.

radius Synonyms and Antonyms

Phrases with radius

  • the area or sphere of one's influence or control

    Example

    As a CEO, his radius of influence extends beyond the company to the entire industry.

  • a contractual agreement that restricts an artist from performing in a certain geographic area for a specified period of time before and after a concert

    Example

    The singer had to cancel her performance due to a radius clause in her contract with another venue.

  • a suspension component in a vehicle that connects the axle to the chassis

    Example

    The mechanic replaced the damaged radius arm in the car's suspension system.

Origins of radius

from Latin 'radius', meaning 'spoke of a wheel'

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Summary: radius in Brief

The term 'radius' [ˈreɪdiəs] refers to a straight line from the center to the circumference of a circle or sphere, as well as an area within a particular distance from a central point. It is used in contexts such as geometry, geography, and transportation, exemplified by 'The radius of the circle is 5 cm.' and 'The store offers free delivery within a 10-mile radius.' 'Radius' also appears in phrases like 'radius of influence,' denoting the area of one's control, and 'radius clause,' referring to a contractual agreement that restricts an artist's performances in a certain geographic area.

How do native speakers use this expression?