What is Pi
'What is Pi?'
A mathematician: 'Pi is the ratio of the circumference of a circle to its diameter.'
A computer programmer: 'Pi is 3.141592653589 in double precision.'
A physicist: 'Pi is 3.14159 plus or minus 0.000005.'
An engineer: 'Pi is about 22/7.'
A nutritionist: 'Pie is a healthy and delicious dessert!'
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