Euclidean geometry

In mathematics, Euclidean geometry is the familiar kind of geometry in two dimensions (on a plane) or in three dimensions. Mathematicians sometimes use the term to encompass higher dimensional geometries with similar properties.

Euclidean geometry sometimes means geometry in the plane which is also called plane geometry. Plane geometry is the kind of geometry usually taught in high school. Euclidean geometry in three dimensions is traditionally called solid geometry. 

Euclidean geometry is named after the Greek mathematician Euclid. Euclid's text Elements is an early systematic treatment of this kind of geometry.

See also