How do you find pi?

Answer 1

pi = 3.141592653589793238462643383279502884197169399375105820974944592307816406286

208998628034825342117067982148086513282306647093844609550582231725359408128481

117450284102701938521105559644622948954930381964428810975665933446128475648233

786783165271201909145648566923460348610454326648213393607260249141273724587006

606315588174881520920962829254091715364367892590360011330530548820466521384146

951941511609433057270365759591953092186117381932611793105118548074462379962749

567351885752724891227938183011949129833673362440656643086021394946395224737190

Some say you find it by dividing 22 by 7.

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In principle, you find the value of pi like this:

-- Draw a circle.

-- Measure the diameter.

-- Measure the circumference.

-- Divide the circumference by the diameter. The answer is 'pi'.

but you can only get a few decimal places that way.

The value of pi also comes out of adding up a 'series' of fractions, where each

fraction is calculated from the same formula. This is a boring exercise if you're

doing it with a pencil, but computers don't get bored, and the current record for

the computer generated value of pi is now 5 trillion decimal places.