Euclid 's Elements ( Ancient Greek : Στοιχεῖα Stoicheia ) is a mathematical and geometric treatise consisting of 13 books written by the ancient Greek mathematician Euclid in Alexandria c. 300 BC .
Euclid 's Elements ( sometimes : The Elements , Greek : Στοιχεῖα Stoicheia ) is a large set of math books about geometry , written by the ancient Greek mathematician known as Euclid ( c. 325 BC-265 BC ) in Alexandria ( Egypt ) circa 300 BC .