---
tag: 0NC9R64TXP
kind: concept
name: Planar graph
msc: [05C10]
sources:
  - url: https://en.wikipedia.org/wiki/Planar_graph
    locator: lead section
same_as:
  wikidata: Q547823
  wikipedia: Planar graph
---

## Summary

A planar graph is a graph that can be drawn in the plane with no crossing edges. Planar graphs are the subject of Euler's formula and of the four colour theorem. The node [[planar graph|029JQEK15B]] gives the precise definition.