## ExoticInspirit one year ago Explain PHI.

1. mathstudent55

$$\Large \phi$$, "phi", is the 21st letter of the Greek alphabet.

2. exoticinspirit

any math to this like PI

3. anonymous

yea lots.

4. anonymous

it can be angle, after they used theta θ , used in complex numbers, sphere coordinates, golden ratio and so on