Useful Numbers
The most useful irrational numbers.
π = 3.14159...
pi
√2 = 1.414...
square root of 2
√3 = 1.732...
square root of 3
ɸ = 1.618...
phi
golden ratio
golden ratio
e = 2.718...
Euler's number
Napier's constant
Napier's constant
Memorize a few digits of each of these mathematical constants.
You will use π, √2, and √3 in simple geometry, ɸ and
e in higher mathematics.