# Euclidean space

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**Euclidean space** is normal space in 3D or 2D.

Before theories of relativity were developed, euclidean space was thought to be an accurate representation of the universe's geometry. Now it is very useful in 3D calculations and approximations.

Euclidean space is widely used in almost all 3D computer applications.

It was described by Euclid in about the year 300BC as what he thought the universe could be measured as. Euclidean space is what physicists thought the world was in, until general relativity and special relativity from Einstein in the first half of the 1900s.

Euclidean space is space that has three orthogonal dimensions, so you can move in one dimension without moving in the other two.