---
tag: 0WB619CA0V
kind: concept
name: Orthocentre
aliases: [orthocenter]
msc: [51M04]
sources:
  - url: https://en.wikipedia.org/wiki/Orthocenter
    locator: lead section
same_as:
  wikidata: Q10621500
  wikipedia: Orthocenter
---

## Summary

The orthocentre of a triangle is the point where the three lines that contain its altitudes meet. It is inside the triangle exactly when all angles are acute.