Linked from

The 137 pages that link to Euclidean geometry, each with the reason it gives.

• Playfair's axiomNarrower topic: Playfair's axiom characterizes the familiar parallel behavior of this geometry.

• Poncelet–Steiner theoremNarrower topic: The theorem preserves the usual Euclidean construction goals despite restricting the instruments.

• British flag theoremNarrower topic: The theorem is a simple metric identity within classical Euclidean geometry.

• Butterfly theoremNarrower topic: The theorem belongs to the classical tradition of synthetic circle geometry.

• Finsler–Hadwiger theoremNarrower topic: The theorem depends on ordinary distances, angles, and squares in the plane.

• Geometric mean theoremNarrower topic: The theorem relies on ordinary angle and similarity properties of Euclidean triangles.

• Mohr–Mascheroni theoremNarrower topic: The theorem concerns constructions within this geometric system.

• Monge's theoremNarrower topic: The theorem is a classical incidence result within Euclidean geometry.

• Pitot theoremNarrower topic: Pitot’s theorem is a classical result within plane geometry.

• Pizza theoremNarrower topic: The cuts and disk are described using ordinary plane geometry.

• Segment Addition PostulateNarrower topic: The postulate belongs to the foundational language of elementary Euclidean geometry.

• Six circles theoremNarrower topic: The theorem uses ordinary planar circles, angles, and incidence.

• Axiom (mathematics and logic)Related: Its parallel postulate became the classic example of a disputed axiom.

• Bottema's theoremNarrower topic: The theorem’s perpendiculars and concurrence are formulated in the Euclidean plane.

• Cantor–Dedekind axiomNarrower topic: The axiom connects Euclidean line geometry to the real number system.

• Constant chord theoremNarrower topic: The theorem is a standard tool for proving metric relations in plane geometry.

• Conway circle theoremNarrower topic: The theorem is a classical incidence and metric result in the Euclidean plane.

• Daina TaimiņaCompared with: Its familiar parallel-line rule contrasts with the geometry Taimiņa’s models illustrate.

• De Gua's theoremNarrower topic: The theorem's perpendicularity and area relation are stated in ordinary Euclidean space.

• Droz-Farny line theoremNarrower topic: The perpendicularity condition depends on Euclidean angle measurement.

• Equal Incircles TheoremNarrower topic: The theorem assumes the usual plane and distance relations.

• Five circles theoremNarrower topic: The theorem is a classical incidence result within plane Euclidean geometry.

• Geometry (configuration)Narrower topic: It supplies the familiar distances and angles used to describe ordinary configurations.

• Gilbert–Pollak conjectureRelated: The claimed constant depends on planar Euclidean distances and 120-degree junctions.

• Haruki's theoremNarrower topic: The theorem belongs to the classical framework in which its circle configuration is interpreted.

• Hjelmslev's theoremCompared with: Euclidean triangles with the same angles can be differently sized and noncongruent.

• Inverse Pythagorean theoremNarrower topic: The theorem’s standard form assumes ordinary Euclidean triangles.

• Law of cotangentsNarrower topic: The stated angle sum, and therefore the identity, assumes a Euclidean triangle.

• Legendre's theorem on spherical trianglesNarrower topic: The theorem produces a Euclidean triangle as an approximation to a spherical one.

• Lester's theoremNarrower topic: The theorem is a plane-Euclidean statement about triangle centers and circles.

• Oronce FineRelated: Geometry supplied methods for Fine’s mathematical teaching and instrument design.

• Pasch's theoremNarrower topic: Pasch's theorem is an order principle used in rigorous formulations of Euclidean geometry.

• Pompeiu's theoremNarrower topic: The theorem is a classical result about distances and triangles in the plane.

• Seven circles theoremNarrower topic: The theorem assumes the ordinary plane and its Euclidean circle properties.

• Steiner–Lehmus theoremNarrower topic: The theorem is a classical result within ordinary plane geometry.

• Van Schooten's theoremNarrower topic: Van Schooten’s result is a metric theorem within the Euclidean plane.

• Wallace–Bolyai–Gerwien theoremNarrower topic: The theorem concerns polygons and rigid motions in the Euclidean plane.