---
tag: 0ZEHZY85E6
kind: concept
name: Angle between two vectors
msc: [51N20]
sources:
  - url: https://en.wikipedia.org/wiki/Angle
    locator: Inner product
---

## Summary

The angle between two nonzero [[vectors|0QN3D80AWP]] measures the turn from the direction of one to the direction of the other. It is a number from $0$ to $\pi$. The dot product of the two vectors and their lengths give its cosine.