Definition, Meaning & Synonyms

radius

noun
/ˈreɪdiəs/
Definition
A line segment that connects the center of a circle to any point on its circumference.
Examples
  • The radius of the circle is 5 cm.
  • The architect used the radius to design the circular pool.
  • To calculate the area of a circle, you need the length of the radius.
Meaning
In geometry, the radius refers to the distance from the center of a circle to its outer edge.
Synonyms
  • Radial distance
  • Span
  • Distance