
    Create a function for the adaptive learning system that calculates the total distance around a regular pentagon-shaped learning path, where each segment represents a skill mastery checkpoint of equal length. Given the length of one checkpoint segment, determine the complete learning journey distance that a student needs to traverse to achieve full topic mastery.
    

    
import math

def perimeter_pentagon(a):
    """
    Create a function for the adaptive learning system that calculates the total distance around a regular pentagon-shaped learning path, where each segment represents a skill mastery checkpoint of equal length. Given the length of one checkpoint segment, determine the complete learning journey distance that a student needs to traverse to achieve full topic mastery.
    

    """
import math

def perimeter_pentagon(a):
    """
    Create a function for the adaptive learning system that calculates the total distance around a regular pentagon-shaped learning path, where each segment represents a skill mastery checkpoint of equal length. Given the length of one checkpoint segment, determine the complete learning journey distance that a student needs to traverse to achieve full topic mastery.
    

    """
    perimeter = 5 * a
    return perimeter