{}
import math
def calculator():
print("\nBasic Calculator")
print("1. Addition")
print("2. Subtraction")
print("3. Multiplication")
print("4. Division")
choice = input("Choose an operation (1-4): ")
num1 = float(input("Enter first number: "))
num2 = float(input("Enter second number: "))
if choice == "1":
print(f"Result: {num1 + num2}")
elif choice == "2":
print(f"Result: {num1 - num2}")
elif choice == "3":
print(f"Result: {num1 * num2}")
elif choice == "4":
if num2 == 0:
print("Error: Division by zero")
else:
print(f"Result: {num1 / num2}")
else:
print("Invalid choice")
def area_perimeter():
print("\nArea & Perimeter Finder")
print("1. Circle")
print("2. Rectangle")
print("3. Square")
print("4. Triangle (Perimeter only)")
choice = input("Choose a shape (1-4): ")
if choice == "1":
radius = float(input("Enter radius: "))
area = math.pi * radius**2
perimeter = 2 * math.pi * radius
print(f"Area: {area:.2f}, Perimeter: {perimeter:.2f}")
elif choice == "2":
length = float(input("Enter length: "))
width = float(input("Enter width: "))
area = length * width
perimeter = 2 * (length + width)
print(f"Area: {area}, Perimeter: {perimeter}")
elif choice == "3":
side = float(input("Enter side length: "))
area = side**2
perimeter = 4 * side
print(f"Area: {area}, Perimeter: {perimeter}")
elif choice == "4":
a = float(input("Enter first side: "))
b = float(input("Enter second side: "))
c = float(input("Enter third side: "))
perimeter = a + b + c
print(f"Perimeter: {perimeter}")
else:
print("Invalid choice")
while True:
print("\nMain Menu")
print("1. Calculator")
print("2. Area & Perimeter Finder")
print("3. Exit")
option = input("Choose an option (1-3): ")
if option == "1":
calculator()
elif option == "2":
area_perimeter()
elif option == "3":
print("Goodbye!")
break
else:
print("Invalid choice, try again.")