Area =(pi)radius2
Circumference = (pi)diameter
The cosmological constant
Heisenberg's uncertainty principle
Einstein's field equation of general relativity
Coulomb's law for the electric force, describing the force between two electric charges (q1 and q2) separated by distance r
Magnetic permeability of free space
Kepler's third law constant, relating the orbital period (P) and the semimajor axis (a) to the masses (M and m) of two co-orbiting bodies
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The most famous problem featuring pi is that its true value has never been determined its decimal places, it seems, are infinite.
Pi appears in calculations involving the circumference and the area of a circle; in problems involving the area and the volume of a sphere; in the volume of an ellipsoid; and in all sorts of problems that are not obviously related to circles and spheres.
Pi is a single number so there cannot be famous numbersof pi.
If the value of pi is the circumference of any circle divided by its diameter then what is the true exact value of pi? Why is it that the exact area of a circle can never be found?
Pi is approximately equal to 3.141592652389793238462.