noun
radius
RAY-dee-us/ˈreɪdiəs/
The straight-line distance from a center to an outer edge.
The marked radius runs from the circle's center to its edge.
Etymology
Latin radius could mean a wheel’s spoke as well as a circle’s radius. A spoke provides a concrete image of the geometric line from the center to the edge, whose length is the radius.
In context
what is the radius what's from the center to the edge of a circle so that center there that distance is thirty point one
More examples
- Draw an arc with the same radius.
- The search covered a ten-mile radius.
- She measured the radius from the center to the edge.
Forms
radius · radii · radiuses
Similar words
- diameter
- Crosses a circle through its center and is twice the radius.