<Dd> 2 π = 6 + 2 2 12 + 6 2 12 + 10 2 12 + 14 2 12 + 18 2 12 + ⋱ (\ displaystyle 2 \ pi = (6 + (\ cfrac (2 ^ (2)) (12 + (\ cfrac (6 ^ (2)) (12 + (\ cfrac (10 ^ (2)) (12 + (\ cfrac (14 ^ (2)) (12 + (\ cfrac (18 ^ (2)) (12 + \ ddots)))))))))))) </Dd> <P> For more on the third identity, see Euler's continued fraction formula . </P> <P> (See also Continued fraction and Generalized continued fraction .) </P> <Dl> <Dd> n! ∼ 2 π n (n e) n (\ displaystyle n! \ sim (\ sqrt (2 \ pi n)) \ left ((\ frac (n) (e)) \ right) ^ (n)) (Stirling's approximation) </Dd> </Dl>

What is an example of a geometric formula that contains pi