Pi is scale-invariant, because it is just a unit-less ratio. The value of pi would be the same even if no universe ever existed. It is equally applicable to all units of measurement, including those used by extraterrestrials. read more
In any case, [math]\pi[/math] is a constant, so yes, any formula for [math]\pi[/math] can work, or be adapted for, the metric system. read more
Any measurement system is in effect, units abducted from other places and sort of made to work together. Generally the units are sort of made together, but not always. The french supposed to replace the nautical mile, by dividing the cicrle into 400 gradess of 100 minutes, the minute of meridian quadrant gives a km, of 1000 metres. read more
Enter the units or the mathematical expression with units that you want to convert. This can be as simple as a unit name or as complex as a formula involving additions, subtractions, multiplications, divisions, powers, square roots, and scientific functions (sin, cos, tan, arcsin, arccos, arctan, sinh, cosh, tanh, log, ln, and exp). read more