Mathematical constant
From Wikipedia, a free encyclopedia written in simple English for easy reading.
A mathematical constant is a number, which has a special meaning for calculations. For example, the constant π (speak: pi) means the ratio of the length of a circle's line to this circle's diameter and this number is for all circle's ca. 3,1414. In contrast to physical constants mathematical constants are not dependent from measurements.
[edit] Some mathematical constants
- Here are some constants you will probably see in a mathematical text
Name of the constant | Symbol | Value, what you have to calculate with | Meaning, usage |
---|---|---|---|
Pi, Archimedes' constant or Ludoph's number | π | ≈ 3,141592653589793 | ratio of the lenght of a circle's line to this circle's diameter, area of the unit circle |
E, Napier's constant | e | ≈ 2,718281828459045 | base of Natural logarithm |
Golden mean | φ | ![]() |
Is a line split in two parts in this ratio, then the ratio of lenghts of the total line L to the longer part B and the ratio of the lengths of the longer part B to the shorter part A have this value. |