Internet Search Results 

Geometry (all content) | Khan Academy
Learn geometry for free—angles, shapes, transformations, proofs, and more. Full curriculum of exercises and videos.

Geometry - Wikipedia
Geometry (from the Ancient Greek: γεωμετρία; geo-"earth", -metron "measurement") is, with arithmetic, one of the oldest branches of mathematics.It is concerned with properties of space that are related with distance, shape, size, and relative position of figures. A mathematician who works in the field of geometry is called a geometer.. Until the 19th century, geometry was almost ...