---
tag: 0QNFRBJF4Q
kind: concept
name: Constructible number
msc: [12F05]
sources:
  - url: https://en.wikipedia.org/wiki/Constructible_number
    locator: lead section
same_as:
  wikidata: Q1321926
  wikipedia: Constructible number
---

## Summary

A constructible number is a complex number that is a point of the plane reachable from $0$ and $1$ by a straightedge and compass construction.
The [[definition of a constructible number|0FMN2MN7TM]] states it.