Page "Baudhayana" Paragraph 18

Many historians have also presented evidence for the fact that Pythagoras actually travelled to Egypt and then India and learned many important mathematical theories ( including Pythagoras theorem ) that western world didn ’ t know of back then!

So, it ’ s very much possible that Pythagoras learned this theorem during his visit to India but hid his source of knowledge he went back to Greece!

This would also partially explain why Greeks were so reserved in crediting Pythagoras with this theorem!