# About

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Euclidean distance is the intuitive notion of a 'straight-line' distance between two points in a Euclidean space.

Euclidian is an an adjective derived form the Name of Euclid. Euclid was a Greek mathematician living around 300 BC. He is known as the "founder of geometry".

Euclidian refers to many topics in geometry, e.g.

• Euclidian space
• Euclidian geometry
• Non-euclidian geometry
• Euclidian distance
• Euclidian ball

and in number theory, e.g.

• Euclidian division
• Euclidian algorithm
• Euclid's lemma

A Euclidian distance is the straight-line distance between two points in Euclidian space. Euclidian space is the conventional 2D or 3D (or for that matter $$n$$D) space that we usually use. It is also called flat space.