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  1. class Point:
  2.     def __init__(self,x,y):
  3.         self.x = x
  4.         self.y = y
  5. def checkCollinearity(P1,P2,P3):
  6.     if P1.x*(P2.y-P3.y) - P1.y*(P2.x-P3.x) + P2.x*P3.y - P2.y*P3.x == 0:
  7.        return True
  8.     else:
  9.        return False
  10. def main():
  11.     Points = []
  12.     for i in range(3):
  13.         print("Point#%d"%(i+1))
  14.         x = float(input("abs="))
  15.         y = float(input("ord="))
  16.         P = Point(x,y)
  17.         Points.append(P)
  18.     #method 1 with Slope    
  19.     if Points[0].x == Points[1].x or Points[0].x == Points[2].x:
  20.        if Points[0].x == Points[2].x:
  21.            print("Collinear.")
  22.        else:
  23.            print("No Collinear.")
  24.     else:
  25.         if((Points[1].y - Points[0].y)/(Points[1].x - Points[0].x) == (Points[2].y - Points[1].y)/(Points[2].x - Points[1].x)):
  26.             print("Collinear.")
  27.         else:
  28.             print("No Collinear.")
  29.  
  30.     #method 2 with Sarrus
  31.     if(checkCollinearity(Points[0], Points[1], Points[2]) is True):
  32.             print("Collinear.")
  33.     else:
  34.             print("No Collinear.")
  35. main()
  36.  
Success #stdin #stdout 0.05s 9732KB
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Point#1
abs=ord=Point#2
abs=ord=Point#3
abs=ord=Collinear.
Collinear.
https://ideone.com/l87qWg
Check Collinearity 3 Points using 2 methods (Slope and Sarrus)
language:
Python 3 (python  3.9.5)
created:
1 year ago
visibility:
secret

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