Okay, i got a little problem. I have to do a research for school about the history of pi. Not that hard you'd think... But then i found that the Egyptians found 3,1605 for pi in 1650 BC. So now i got to find out how he found it out.
he used the formula: Volume of a cylinder = ((1-1/9)d)²h if you calculate it you get 256/81 r² h so he found 256/81 for pi. But i don't get the start. where did that ((1-1/9)d)²h came from? i know it replaces pi r² in our modern formula but that's about it...
I thought it came from the relation between a square and circle, but after looking into that for the last 2 days, i still haven't figured it out.
If someone could help me with this i'd be very grateful.
with regards, danielrowling.
P.S. I hope i posted it in the correct section.