Why are those two square roots..........in decimal form important?................b/c those are the TWO interpretations of the hypotenuse of my triangle........I made for 2 to the i............

e (Euler's Number)

The number e is a famous irrational number, and is one of the most important numbers in mathematics.
The first few digits are:

2.7182818284590452353602874713527 (and more ...)

It is often called Euler's number after Leonhard Euler.
And Euler is spoken like "Oiler".