Implement the Archimedes method $($Sec$.2\mathrm{.}4$ in PPC$)$ using the following

function signature. In your function, return the computed approximation of $($do not change

the name or type of argument and return value$).$ Feel free to use the book version or come up

with your own.

def pi$\_$arch$($num$\_$sides: int$)->$ float

Function signatures are informative; they contribute to documenting your code. Signatures

describe the input parameters' data types and the return value. Signatures do not perform any

data type validation