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Value of pi 3.141592653589793238462643383279........................

 the prime-counting function
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Pi is an irrational number.It is the ratio between the circumference of a circle to its diameter.
Its value is 22/7 or 3.142857143(app.3.14)
its function is to calculate the area,diameter,volume,surface area of circle,semicircle,sphere,cone and cylinder.
                                    ***Hope these helped***
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