circular line
C51890
concept
A circular line is a closed, continuous curve in which all points are equidistant from a central point, forming the boundary of a circle.
Observed surface forms (1)
| Surface form | Occurrences |
|---|---|
| circle | 1 |
Instances (2)
| Instance | Via concept surface |
|---|---|
| Line 12 (Madrid Metro) | — |
| Soddy circle | circle |