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define pipi =3.142

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sagarjha09 | Student, Grade 9 | eNotes Newbie

Posted August 19, 2011 at 11:21 PM via web

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define pi

pi =3.142

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pirate67 | Middle School Teacher | (Level 1) eNoter

Posted August 20, 2011 at 12:49 AM (Answer #1)

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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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pirate67 | Middle School Teacher | (Level 1) eNoter

Posted August 20, 2011 at 12:51 AM (Answer #2)

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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.

 

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taylormath | High School Teacher | (Level 2) Adjunct Educator

Posted September 14, 2011 at 12:58 PM (Answer #4)

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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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