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Because pi is an irrational number, it cannot be calculated exactly (as a decimal), so your question is moot. However, since it can be expressed as a ratio or fraction, its "exact" value can nonetheless be used in any mathematical or physical context that requires it; it simply can't be expressed as a decimal or as a fraction.
Since pi appears as the results of many calculations, the accuracy of pi affects the accuracy of the calculations, therefore the the use of more accurate calculations of pi is used when these calculations require a very small margin of error.
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What is a measurement that is exact as possible?
metric system as it is worked on calculation of the distance of earth from the sun. and use's that as a frame of reference. Kevin
When to use rounding?
There are two main situations.when one (or more components) in a calculation is given in rounded form, it will limit the accuracy of the answer. For example, if you use pi = 3.1416 then the calculated area should not have more than 5 significant digits.if the answer to an exact calculation is a long decimal string - particularly an irrational number.
Which would not provide a useful measurement of temperature?
A micrometer would not be any use.A micrometer would not be any use.A micrometer would not be any use.A micrometer would not be any use.
How do you use exact in a sentence?
Exact means precise, spot on, perfect (As in similarity... not as in 'wonderful')Example:The vault would not open without the exact sequence of numbers being entered in the right order.
What is the word you use to work out a sum?
Any +++ Strictly speaking, it is ADD. The word 'sum' is used colloquially for any simple arithmetical calculation, but in mathematics a 'sum' is properly the result of adding two or more numbers.
