
    Calculate the total boundary distance a delivery vehicle must cover to patrol the edges of its pentagon-shaped service zone, given the length of one boundary segment in kilometers. The service zone is a regular pentagon used to define the delivery vehicle's territory limits, and the total boundary distance is essential for route planning and fuel consumption estimates.
    

    
import math

def perimeter_pentagon(a):
    """
    Calculate the total boundary distance a delivery vehicle must cover to patrol the edges of its pentagon-shaped service zone, given the length of one boundary segment in kilometers. The service zone is a regular pentagon used to define the delivery vehicle's territory limits, and the total boundary distance is essential for route planning and fuel consumption estimates.
    

    """
import math

def perimeter_pentagon(a):
    """
    Calculate the total boundary distance a delivery vehicle must cover to patrol the edges of its pentagon-shaped service zone, given the length of one boundary segment in kilometers. The service zone is a regular pentagon used to define the delivery vehicle's territory limits, and the total boundary distance is essential for route planning and fuel consumption estimates.
    

    """
    perimeter = 5 * a
    return perimeter