#Question 6

import math

print("""
A - Rectangle
B - Triangle
C - Circle
""")

shape = input("Enter shape: ")


if shape.upper() == "A":
    height = float(input("Enter height: "))
    base = float(input("Enter base: "))
    area = height * base
elif shape.upper() == "B":
    height = float(input("Enter height: "))
    base = float(input("Enter base: "))
    area = 0.5 * height* base
elif shape.upper() == "C":
    radius = int(input("Enter radius: "))
    area = math.pi * radius ** 2

print("Area =", area)