 The Leibniz formula for states that
Leibniz wrote that circles "can most simply be expressed by this series, that is, the aggregate of fractions alternately added and subtracted".However this formula is only accurate with a large number of terms, using 10,000,000 terms to obtain the correct value of to 8 decimal places.Leibniz attempted to create a definition for a straight line while attempting to prove the parallel postulate.