
    Calculate the total length of safety barriers needed for installation around a pentagonal bus terminal, where each side of the terminal has equal length. The perimeter calculation will determine the complete coverage required for passenger walkways and security patrol routes around the facility.
    

    
import math

def perimeter_pentagon(a):
    """
    Calculate the total length of safety barriers needed for installation around a pentagonal bus terminal, where each side of the terminal has equal length. The perimeter calculation will determine the complete coverage required for passenger walkways and security patrol routes around the facility.
    

    """
import math

def perimeter_pentagon(a):
    """
    Calculate the total length of safety barriers needed for installation around a pentagonal bus terminal, where each side of the terminal has equal length. The perimeter calculation will determine the complete coverage required for passenger walkways and security patrol routes around the facility.
    

    """
    perimeter = 5 * a
    return perimeter