# define pipi =3.142

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`pi` does not exactly equal 3.14.  Most mathematicians cringe when people say that it does. The definition for pi is that it represents the ratio of the circumference of a circle to its diameter.  Another way to say the definition is that pi is the circumference of a circle divided by its diameter, `pi=C/d` . The true decimal value of pi will never be known since the decimals do not terminate or have a repeating pattern.  It is an irrational number and cannot be expressed as a fraction where the numerator and denominator are integers.  When needing the value of pi to calculate a value, the best approximation is to use the pi button on a calculator.

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Pi is the ratio of the circumference of a circle to its diameter.

For example if the circumference was 22 and the diameter 7, pi would be calculated by 22/7.

It was observed by the ancient Greek mathematecians that this number would always be 3.14, thus you can call it a constant.

The number is also in irrational number. The numbers right of the decimal go on indefinitely and do not repeat themselves.

Posted on

Pi is the ratio of the circumference of a circle to its diameter.

For example if the circumferece was 22 and the diameter 7, pi would be calculated by 22/7.

It was observed by the ancient Greek mathematecians that this number would always be 3.14, thus you can call it a constant.

The number is also in irrational number. The numbers right of the decimal go on indefinitely and do not repeat themselves.

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