Pythagoras implementation math class.

[beqakd]

Detailed Description

I want to implement some math class function as it was so few in folder. I can start by pythagoras function.

Context

Its one of the most important feature in math so i think its important.

[PaulinaQuintero]

Hello! Can I work on pythagoras function? Or is already taken by someone?

[beqakd]

Taken by me. will upload it today.

[PaulinaQuintero]

I can upload the calculation of the complex's module number to complement that folder

[PaulinaQuintero]

I did it
#837
Could you check it?