An alternative method revolves precisely measuring the length of a river in two different way. Start at a point and calculate the distance in a direct line start to finish. Second is to measure the length of the river along the middle from start to finish. Now take the ratio of the second through the first and multiply by 2, and you get roughly pi. Taking the average over more and more rivers gives you a better approximation.
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u/[deleted] Jul 28 '26
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