---
tag: 0VKCCEXBJ1
kind: concept
name: Ellipse
msc: [51N20]
sources:
  - url: https://en.wikipedia.org/wiki/Ellipse
    locator: lead section
same_as:
  wikidata: Q40112
  wikipedia: Ellipse
---

## Summary

An ellipse is a closed plane curve with two foci. For each point of the curve, the sum of the distances to the two foci is the same constant. A circle is the special case of an ellipse where the two foci are the same point.