Constant
Pronunciation: /ˈkɒn.stənt/ Explain
A constant is a value that does not
change.^{[1]} It can also be a letter that represents a value that does not change.
Examples
- pi or π
is used to represents the ratio of the circumference of a circle to its diameter.
Since π always has the same value, it is a constant.
- In the expression 2 + y, the
2 is a constant value.
- In the linear equation
y = m·x +
b, both m and b represent values that
do not change.
Commonly Used Constants
- Zero, 0·a = 0,
0 + a = a
0
- One, 1·a = 1
1
- π, the ratio of the length of the circumference of a circle to the diameter.
π ≈ ˜3.14159265358979323846264338327950288
- Euler's number, the base of the natural logarithm.
e ≈ ˜2.71828182845904523536028747135266249
- Phi, the golden ratio.
φ = (1+square root(5))/2 ˜≈ 1.61803398874989484820458683436563811
- i, the imaginary unit.
i = square root of -1.
References
- McAdams, David E.. All Math Words Dictionary, constant. 2nd Classroom edition 20150108-4799968. pg 44. Life is a Story Problem LLC. January 8, 2015. Buy the book
- Kornegay, Chris. Constant. 2nd edition. pg 72. Math Dictionary With Solutions: A Math Review. Sage Publications, Inc. March 6 1999. Last Accessed 6/25/2018. Buy the book
- Bettinger, Alvin K. and Englund, John A.. Algebra and Trigonometry. pp 53-54. www.archive.org. International Textbook Company. January 1963. Last Accessed 6/25/2018. http://www.archive.org/stream/algebraandtrigon033520mbp#page/n70/mode/1up/search/constant. Buy the book
Cite this article as:
McAdams, David E. Constant. 4/16/2019. All Math Words Encyclopedia. Life is a Story Problem LLC. http://www.allmathwords.org/en/c/constant.html.
Revision History
4/16/2019: Updated equations and expressions to new format. (
McAdams, David E.)
12/21/2018: Reviewed and corrected IPA pronunication. (
McAdams, David E.)
6/25/2018: Removed broken links, updated license, implemented new markup, updated GeoGebra apps. (
McAdams, David E.)
1/20/2010: Added "References". (
McAdams, David E.)
1/5/2010: Added "References". (
McAdams, David E.)
11/21/2008: Added 'More Information'. (
McAdams, David E.)
7/9/2008: Minor edit and added vocabulary link to linear equation. (
McAdams, David E.)
2/13/2008: Initial version. (
McAdams, David E.)