
    Calculate the total border distance of a pentagon-shaped delivery zone that needs to be monitored by delivery vehicles, given the length of each boundary segment in kilometers. The delivery zone is a regular pentagon where all sides are equal in length, and the total perimeter distance is needed for route planning and fuel estimation purposes.
    

    
import math

def perimeter_pentagon(a):
    """
    Calculate the total border distance of a pentagon-shaped delivery zone that needs to be monitored by delivery vehicles, given the length of each boundary segment in kilometers. The delivery zone is a regular pentagon where all sides are equal in length, and the total perimeter distance is needed for route planning and fuel estimation purposes.
    

    """
import math

def perimeter_pentagon(a):
    """
    Calculate the total border distance of a pentagon-shaped delivery zone that needs to be monitored by delivery vehicles, given the length of each boundary segment in kilometers. The delivery zone is a regular pentagon where all sides are equal in length, and the total perimeter distance is needed for route planning and fuel estimation purposes.
    

    """
    perimeter = 5 * a
    return perimeter