Geometry is not invented by single individual. Many Mathematicians around world addred their inventions in the Geometry. But Euclid is considered to be Poioneer in Geometry.
http://answers.ask.com/Science/Mathematics/who_inv...

The answer is in the word  Geo means 'Earth' and 'metry' means 'measure' Geometry means to measure the earth. Ancient Egyptians used a form of simple geometry. When buildings or
http://wiki.answers.com/Q/Why_did_they_invent_geom...

Geometry was thoroughly organized in about 300 BC, when the Greek mathematician
http://www.chacha.com/question/whodiscoveredori...

It seems that in the 1820s or thereabout, Gauss, Janos Bolyai, and Lobachevski all independently explored what would happen to Euclidean geometry if the parallel postulate were modified
http://answers.yahoo.com/question/index?qid=200709...
