
    Calculate the total length of medical-grade containment barriers needed for a pentagonal isolation ward, where monitoring sensors must be installed at equal intervals along each side of the ward's perimeter, given that each side measures the same length in meters. The isolation ward's layout forms a perfect pentagon, and the containment system must cover the entire perimeter without any gaps.
    

    
import math

def perimeter_pentagon(a):
    """
    Calculate the total length of medical-grade containment barriers needed for a pentagonal isolation ward, where monitoring sensors must be installed at equal intervals along each side of the ward's perimeter, given that each side measures the same length in meters. The isolation ward's layout forms a perfect pentagon, and the containment system must cover the entire perimeter without any gaps.
    

    """
import math

def perimeter_pentagon(a):
    """
    Calculate the total length of medical-grade containment barriers needed for a pentagonal isolation ward, where monitoring sensors must be installed at equal intervals along each side of the ward's perimeter, given that each side measures the same length in meters. The isolation ward's layout forms a perfect pentagon, and the containment system must cover the entire perimeter without any gaps.
    

    """
    perimeter = 5 * a
    return perimeter