Question

why did anyone didn't find the Pythagoras theorem, before Pythagoras?​

Answer 1

If anyone founded his name would have come, ex: Vicky, it becomes Vicky theorem. Then you would have posted why anyone didn’t found before Vicky.
Someone should find know??

Answer 2

Before Pythagoras in 800 B.C our Indian Mathematician Baudhyan told the therom as " The diagonal of a rectangle produces by itself the same area as produced by its both sides".(i.e. length and breadth)

so sometimes, its called as Baudhyan Therom.