Definition

A straight line from the center of a circle to its edge, or the distance from the center to the edge of a circular area.

Example

The radius of the circle is five centimeters.

Conversation

Did you know the radius of the new park is almost a mile?

Wow, that's pretty big! I didn't expect it to be that spacious.

Yeah, they want to make sure there's enough room for everyone.

That makes sense, especially with all the activities they have planned.

Synonyms & Antonyms

Root Explanation

Radius → It is derived from Latin 'radius' (meaning ray or spoke of a wheel). The word 'radius' refers to a line segment from the center of a circle to any point on its circumference, resembling a ray extending outward.

Memory Tip

Imagine a ray of light ('radius' means ray) extending from the center of a circle to its edge, helping you remember that a radius is that line from the center to the circle's edge.

Visually Confused Words