#### Exercise 41

- Write a
**Rectangle class**in Python language, allowing you to build a rectangle with**length**and**width**attributes. - Create a
**Perimeter()**method to calculate the perimeter of the rectangle and a**Area()**method to calculate the area of the rectangle. - Create a method
**display()**that display the length, width, perimeter and area of an object created using an instantiation on rectangle class. - 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

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

my-courses.net