The purpose of this exercise is to create classes like class Circle from Chapter

Question

The purpose of this exercise is to create classes like class Circle from Chapter 7.2.3 for representing other geometric figures: a rectangle with width W, height H, and lower left corner (x_0, y_0); and a general triangle specified by its three vertices (x_0, y_0), (x_1, y_1), and (x_2, y_2) as explained in Exercise 3.3. Provide three methods: _ _init_ _. (to initialize the geometric data), area, and circumference. Name of program file: geometric_ahapes.py. Write a test code after the class definition to demonstrate its usage.

Explanation / Answer

#!/usr/bin/python
import math # This will import math module
class triangle: #triangle class
def __init__(self, x0, y0, x1, y1, x2, y2): # initializing class variables
self.x0=x0
self.y0=y0
self.x1=x1
self.y1=y1
self.x2=x2
self.y2=y2
def triarea(self): # calculating area and circumference
a=(math.pow((self.x1-self.x0),2)+ math.pow((self.y1-self.y0),2))**(0.5)
b=(math.pow((self.x2-self.x1),2)+ math.pow((self.y2-self.y1),2))**(0.5)
c=(math.pow((self.x2-self.x0),2)+ math.pow((self.y2-self.y0),2))**(0.5)
s=0.5*(a+b+c);
areatri=(s*(s-a)*(s-b)*(s-c))**(0.5);
print (areatri);
circumtri=a+b+c;
print("circumference of triangle is :"% circumtri);
class rect:# rectangle class
def __intit__(self,height,width): # initializing class variables
self.height=height;
self.width=width;
def rectarea(self): # calculating area and circumference
arearect=self.width*self.height;
print (arearect);
circumrect=2*(self.width+self.height);
print("circumference of rectangle is :"%circumrect);
st="y"
while st == "y": # condition to continue with the program
ch=input("Enter your Shape: 1. Triangle 2. Rectangle"); # asking user the shape
if ch=="1": # Uses triangle.
tri=triangle(1,5,-2,2,6,-1) # This would create object of triangle class
print("the area of the trianngle" % tri.triarea()) # calling area method
elif ch=="2": # Uses rectangle.
rec=rectangle(12,10) # This would create object of rectangle class
print("the area of rectangle" % rec.rectarea()) # calling area method
st = input("Do you want to calculate another shape's area?: ") # This line allows the user the chance to do just what it says in the brackets.
if st == "n": #This is for when the user no longer wants to use the program.
print("Goodbye then!")
input("Press any key to close")
  

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.