KnowraConstructible numberLinked fromLinked fromThe 9 pages that link to Constructible number, each with the reason it gives.All 9Broader topic 1Related 5Narrower topic 2Compared with 1Doubling the cubeNarrower topic: The required length is not constructible by these allowed operations.Gauss–Wantzel theoremNarrower topic: Polygon construction reduces to whether its coordinates or trigonometric values are constructible numbers.