area of an equilateral triangle in python

# Python3 program to calculate Area and  
# Perimeter of equilateral Triangle 
  
# Importing Math library for sqrt 
from math import *
  
# Function to calculate Area  
# of equilateral triangle 
def area_equilateral( side ): 
    area = (sqrt(3) / 4) * side * side 
    print ("Area of Equilateral Triangle: % f"% area) 
  
# Function to calculate Perimeter 
# of equilateral triangle  
def perimeter( side ): 
    perimeter = 3 * side 
    print ("Perimeter of Equilateral Triangle: % f"% perimeter) 
      
# Driver code 
side = 4
area_equilateral( side ) 
perimeter( side )