# area_calculator.py

# area_calculator.py

import math

shapes = '''
Square
Triangle
Circle
Rectangle
Rhombus
Trapezoid
Quadrillateral
Sector
Ellipse
Prism
Regular Polygon
'''

c=shapes.split('\n')
shapes=''
for a, b in enumerate(c[1:-1]):
    a=str(a).zfill(2)
    shapes += a+'.) '+b+'\n'

def get_shape_area():
    print shapes
    shape=int(input("What shape are you looking for the area of? "))
    if shape==0:
        square()
    elif shape==1:
        triangle()
    elif shape==2:
        circle()
    elif shape==3:
        rectangle()
    elif shape==4:
        rhombus()
    elif shape==5:
        trapezoid()
    elif shape==6:
        quadrillateral()
    elif shape==7:
        sector()
    elif shape==8:
        ellipse()
    elif shape==9:
        prism()
    elif shape==10:
        reg_polygon()
    else:
        print("Error: Select a number on the list: ")

def rectangle():
    h=int(input("What is the height of the rectangle? "))
    w=int(input("What is the width of the rectangle? "))
    area=w*h
    print("The area of the rectangle is...")
    print(area)


def circle():
    r=int(input("What is the radius of the circle? "))
    area=math.pi*r*r
    print("The area of the circle is...")
    print(area)

def square():
    h=int(input("What is the height of the square? "))
    area=h*h
    print("The area of the square is...")
    print(area)

def triangle():
    w=int(input("What is the width of the base of the triangle? "))
    h=int(input("What is the height of the triangle? "))
    area=w*h*0.5
    print("The area of the triangle is...")
    print(area)

def rhombus():
    c=int(input("What is the length of diagonal 1? "))
    d=int(input("What is the length of diagonal 2? "))
    area=0.5*c*d
    print("The area of the rhombus is...")
    print(area)

def trapezoid():
    a=int(input("What is the length of the first parallel side? "))
    b=int(input("What is the length of the second parallel side? "))
    h=int(input("What is the altitude of the trapezoid? "))
    area=0.5*(a+b)*h
    print("The area of the trapezoid is...")
    print(area)

def quadrillateral():
    a=int(input("What is the length of diagonal 1? "))
    b=int(input("What is the length of diagonal 2? "))
    angle=int(input("What is the angle between the diagonals? "))
    area=0.5*a*b*math.sin(angle)
    print("The area of the quadrillateral is...")
    print(area)

def reg_polygon():
    n=int(input("How many sides? "))
    l=int(input("Length of each side? "))
    area=(n*l**2)/(4*math.tan((180/n)*(math.pi/180)))
    print("The area of the regular polygon is...")
    print(area)

def sector():
    angle=int(input("What is the angle between the radii? "))
    pi=math.pi
    r=int(input("What is the radius? "))
    area=(pi*(r*r)*angle)/360
    print("The area of the sector is...")
    print(area)

def ellipse():
    a=int(input("What is the first semiaxes? "))
    b=int(input("What is the second semiaxes? "))
    pi=math.pi
    area=pi*a*b
    print("The area of the ellipse is...")
    print(area)

def prism():
    a=int(input("What is the perimeter of a right section of the prism? "))
    b=int(input("What is the length of the prism? "))
    area=a*b
    print("The lateral area of the regular prism is...")
    print(area)
#
while 1:
    get_shape_area()
    print
    user_input = raw_input('Calculate More (y/n) ? ')
    print
    if user_input.lower() != 'y':
        break