# Solution Exercise 41 - Rectangle class and inherited child Parallelepipede class

Feb 29, 2020

#### Exercise 41

1. Write a Rectangle class in Python language, allowing you to build a rectangle with length and width attributes.
2. Create a Perimeter() method to calculate the perimeter of the rectangle and a Area() method to calculate the area of ​​the rectangle.
3. Create a method display() that display the length, width, perimeter and area of an object created using an instantiation on rectangle class.
4. Create a Parallelepipede child class inheriting from the Rectangle class and with a height attribute and another Volume() method to calculate the volume of the Parallelepiped.

#### Solution

``class Rectangle:    # define constructor with attributes: length and width     def __init__(self, length , width):        self.length = length        self.width = width            # Create Perimeter method    def Perimeter(self):        return 2*(self.length + self.width)        # Create area method    def Area(self):        return self.length*self.width           # create display method    def display(self):        print("The length of rectangle is: ", self.length)        print("The width of rectangle is: ", self.width)        print("The perimeter of rectangle is: ", self.Perimeter())        print("The area of rectangle is: ", self.Area())class Parallelepipede(Rectangle):    def __init__(self, length, width , height):        Rectangle.__init__(self, length, width)        self.height = height            # define Volume method    def volume(self):        return self.length*self.width*self.height        myRectangle = Rectangle(7 , 5)myRectangle.display()print("----------------------------------")myParallelepipede = Parallelepipede(7 , 5 , 2)print("the volume of myParallelepipede is: " , myParallelepipede.volume())``

The output is:
The length of rectangle is:  7
The width of rectangle is:  5
The perimeter of rectangle is:  24
The area of rectangle is:  35
----------------------------------
the volume of myParallelepipede is:  70

Younes Derfoufi
my-courses.net