"""
Find the area of various geometric shapes
"""
from math import pi


def surface_area_cube(side_length: float) -> float:
 """
 Calculate the Surface Area of a Cube.

 >>> surface_area_cube(1)
 6
 >>> surface_area_cube(3)
 54
 """
 return 6 * side_length ** 2


def surface_area_sphere(radius: float) -> float:
 """
 Calculate the Surface Area of a Sphere.
 Wikipedia reference: https://en.wikipedia.org/wiki/Sphere
 :return 4 * pi * r^2

 >>> surface_area_sphere(5)
 314.1592653589793
 >>> surface_area_sphere(1)
 12.566370614359172
 """
 return 4 * pi * radius ** 2


def area_rectangle(length: float, width: float) -> float:
 """
 Calculate the area of a rectangle

 >>> area_rectangle(10,20)
 200
 """
 return length * width


def area_square(side_length: float) -> float:
 """
 Calculate the area of a square

 >>> area_square(10)
 100
 """
 return side_length ** 2


def area_triangle(base: float, height: float) -> float:
 """
 Calculate the area of a triangle

 >>> area_triangle(10,10)
 50.0
 """
 return (base * height) / 2


def area_parallelogram(base: float, height: float) -> float:
 """
 Calculate the area of a parallelogram

 >>> area_parallelogram(10,20)
 200
 """
 return base * height


def area_trapezium(base1: float, base2: float, height: float) -> float:
 """
 Calculate the area of a trapezium

 >>> area_trapezium(10,20,30)
 450.0
 """
 return 1 / 2 * (base1 + base2) * height


def area_circle(radius: float) -> float:
 """
 Calculate the area of a circle

 >>> area_circle(20)
 1256.6370614359173
 """
 return pi * radius ** 2


def main():
 print("Areas of various geometric shapes: \n")
 print(f"Rectangle: {area_rectangle(10, 20)}")
 print(f"Square: {area_square(10)}")
 print(f"Triangle: {area_triangle(10, 10)}")
 print(f"Parallelogram: {area_parallelogram(10, 20)}")
 print(f"Trapezium: {area_trapezium(10, 20, 30)}")
 print(f"Circle: {area_circle(20)}")
 print("\nSurface Areas of various geometric shapes: \n")
 print(f"Cube: {surface_area_cube(20)}")
 print(f"Sphere: {surface_area_sphere(20)}")


if __name__ == "__main__":

 import doctest

 doctest.testmod(verbose=True) # verbose so we can see methods missing tests

 main()