 thales yavaru ?
 thales ooka greeku ganita saastrajnudu .  athanu tana peruu pettabadina siddaantaaniki prassiddhi chendhaadu  -  thales siddhaantam  -  semisarkil ‌ nu touching vyaasampai edaina thribhujam deerghachaturasrakaramga untundani perkondi .