---
tag: 05HN08ZSRJ
kind: concept
name: Dihedral angle
msc: [51N20]
sources:
  - url: https://en.wikipedia.org/wiki/Dihedral_angle
    locator: lead section
same_as:
  wikidata: Q911907
  wikipedia: Dihedral angle
---

## Summary

A dihedral angle is the angle between two planes that meet in a line, or between two half-planes with a common edge. It is measured in a third plane that is perpendicular to the common line.