Calculate Area

 import math

def circle_area(radius):

    return math.pi*radius**2

def square_area(side):

    return side ** 2

def rectangle_area(length, width):

    return length * width

def tringle_area(base, height):

    return 0.5*base*height

def menu():

    print("1.circle : ")

    print("2.square : ")

    print("3.rectangle : ")

    print("4.tringle : ")

    print("5.exit : ")

    print()

While True:

    menu()

    choice= input("Enter Choice : ")

    if choice=='1':

        redius = float(input("Enter the radius of circle : "))

        area = circle_area(radius)

     elif choice=='2':

        redius = float(input("Enter length of side of square : "))

        area = square_area(side)

     elif choice=='3':

        length = float(input("Enter the length  of rectangle : "))

        width =  float(input("Enter the width  of rectangle : "))

        area= rectangle_area(length,width)

        print("the are of rectangle",area)

    elif choice='5':

        print("Existing the program.....")

        break;

    else:

        print("Invalid choice")

print()