Mathigon
Mathigon: Euclidean Geometry: Euclid's Axioms
This lesson focuses on Euclid's Axioms, simple, intuitive statements, that everyone agrees are true. An axiom(or postulate) is a mathematical statement that is regarded as "self-evident" and accepted without proof. A key part of...
Wolfram Research
Wolfram Math World: Euclid's Postulates
This site from MathWorld.com provides a listing of the postulates of Euclid and a brief discussion on the validity of the fifth postulate.
Wolfram Research
Wolfram Math World: Euclid: The Elements
The classic treatise in geometry written by Euclid is presented in English. It is the textbook used for more than 1,000 years in western Europe.
University of St. Andrews (UK)
University of St. Andrews: Euclid of Alexandria
Provides information on Euclid's accomplishments as a mathematician.
Other
The Mathematical Elements of Euclid
An extensive discussion of the Elements, which contains all the geometrical knowledge available in the Hellenistic period.
TED Talks
Ted: Ted Ed: Euclid's Puzzling Parallel Postulate
Euclid, known as the "Father of Geometry," developed several of modern geometry's most enduring theorems--but what can we make of his mysterious fifth postulate, the parallel postulate? Jeff Dekofsky shows us how mathematical minds have...
University of St. Andrews (UK)
University of St. Andrews: Galileo Galilei
This site from the University of St. Andrews contains biographical information about Galileo's life and studies.
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- Euclidean Geometry
- Euclidean Geometry Proofs
- Euclid Geometry
- Non Euclidean Geometry
- Euclidian Geometry
- Non Euclidean Geometry