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Euclidean geometry - Wikipedia
Euclidean geometry | Definition, Axioms, & Postulates | Britannica
Euclidean - Wikipedia
Euclid - Wikipedia
Euclidean Geometry (Definition, Facts, Axioms and Postulates)
Euclidean Geometry - GeeksforGeeks
4.1: Euclidean Geometry - Mathematics LibreTexts
Euclidean -- from Wolfram MathWorld
Euclidean geometry - Encyclopedia of Mathematics