Approximate

Pronunciation: /əˈprɒk səˌmeɪt/ ?

To approximate is to find a number close to a real number.[1] Since irrational numbers can not be exactly stated as a decimal, an approximation is used. For example, the value of π is approximately 3.14159. The symbol for writing 'approximately equal to' is ''. For example, π ≈ 3.14159.

One method of approximation is called interpolation. The study of approximation in mathematics is called approximation theory which is a branch of numerical analysis.

References

  1. approximate. http://wordnet.princeton.edu/. WordNet. Princeton University. (Accessed: 2011-01-08). http://wordnetweb.princeton.edu/perl/webwn?s=approximate&sub=Search+WordNet&o2=&o0=1&o7=&o5=&o1=1&o6=&o4=&o3=&h=.
  2. Lambert, P.A., M.A.. Computation and Mensuration, pg 1. MacMillan and Company, 1907. (Accessed: 2010-01-06). http://www.archive.org/stream/computationmensu00lambrich#page/1/mode/1up/search/approximate.

Educator Resources

  • Estimate and Measure. NASA Connect. NASA LaRC Office of Education. 2010-02-18. http://www.archive.org/details/NasaConnect-Bhfste-EstimateAndMeasure.
  • Serving Size Activity. NASA Connect. NASA LaRC Office of Education. 2010-02-18. http://www.archive.org/details/NasaConnect-Bhfste-ServingSizeActivity.

Cite this article as:


Approximate. 2010-01-04. All Math Words Encyclopedia. Life is a Story Problem LLC. http://www.allmathwords.org/en/a/approximate.html.

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Revision History


2010-01-06: Added "References" (McAdams, David.)
2008-10-10: Added paragraph on interpolation. Expanded 'More Information' (McAdams, David.)
2008-04-18: Initial version (McAdams, David.)

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