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siderail
Click on one of the "numbers" in the circle for an explanation.
Unused
e
\i
\pi
\sqrt2
\sqrt3
\sqrt5
\phi
Click on the smallest nonzero value
e also known as Euler's number (oiler) is a mind blowing number in and of itself.
To calculate Euler's Number simply begin with 1 and add to it as a small a number as possible.
Next take the result and multiply it by itself as many times as possible. Written as a limit that calculation looks like this:
i (aka j for the electrical engineers) is the square root of negative 1. For those who do not care to deal with the algebra of i at the moment, just remember that in certain graphing systems multiplying by i will cause your "thing" to rotate 90 degrees.
pi ...is the ratio of a circle's Circumference to its Diameter. The minute you forget that and start using 3.14 without thinking...this is not a good minute.
phi ...is the golden ratio. It is the ratio of one term to another in the Fibonacci Series. (After ...the 13th term). It is also the average of 1 and the square root of 5.
The Square root of 2 is also called the Pythagorean Number. Geometrically it is the length of the hypotenuse of a right isosolese triangle with legs of length 1.
The Square roots of 3 and 5 are also unique enough to merit special attention. They both emerge from a simple and classic geometric construction.