In mathematics, Euclidean geometry is the familiar kind of geometry in
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.